FORM OF UNDERWRITING AGREEMENT

Exhibit 1.1

2,789,203 Shares

INFUSYSTEM HOLDINGS, INC.

Common Stock

UNDERWRITING AGREEMENT

October [ ], 2010

Roth Capital Partners, LLC

24 Corporate Plaza

Newport Beach, CA 92660

As Representative of the Several Underwriters

Named on Schedule I hereto

Ladies and Gentlemen:

I-Flow Corporation (the “Selling Stockholder”), a stockholder of InfuSystem Holdings, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to sell to the underwriters listed on Schedule I hereto (the “Underwriters”), for whom Roth Capital Partners, LLC is acting as representative (the “Representative”), 2,789,203 shares of the Company’s common stock, par value $0.0001 per share (the “Shares”). The Underwriters shall purchase, severally and not jointly, and the Selling Stockholder shall sell to the Underwriters, the number of Shares set forth opposite the Underwriters’ respective names on Schedule I.

The Company, the Selling Stockholder and the Representative hereby confirm their agreement as follows:

1. Registration Statement and Prospectus. The Company has prepared and filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-1 (File No. 333-169497) under the Securities Act of 1933, as amended (the “Securities Act”) and the rules and regulations (the “Rules and Regulations”) of the Commission thereunder, and such amendments to such registration statement (including post effective amendments) as may have been required to the date of this Agreement and a preliminary prospectus or “red herring” pursuant to Rule 424(b) under the Securities Act. Such registration statement, as amended (including any post effective amendments) has been declared effective by the Commission. Such registration statement, at any given time, including amendments thereto (including post effective amendments thereto) at such time, the exhibits and any schedules thereto at such time and the documents and information otherwise deemed to be a part thereof or included therein by Securities Act or otherwise pursuant to the Rules and Regulations at such time, is herein called the “Registration Statement.” If the Company has filed or files an abbreviated registration statement pursuant to Rule 462(b) under the Securities Act (the “Rule 462 Registration Statement”), then any reference herein to the term Registration Statement shall include such Rule 462 Registration Statement. The Company is filing with the Commission

pursuant to Rule 424 under the Securities Act a final prospectus supplement relating to the Shares to a form of prospectus included in the Registration Statement. Such prospectus in the form in which it appears in the Registration Statement is hereinafter called the “Base Prospectus,” and such final prospectus supplement as filed, along with the Base Prospectus, is hereinafter called the “Final Prospectus.” Such Final Prospectus and any preliminary prospectus supplement or “red herring,” in the form in which they shall be filed with the Commission pursuant to Rule 424(b) under the Securities Act (including the Base Prospectus as so supplemented) is hereinafter called a “Prospectus.” “Time of Sale Disclosure Package” means the Base Prospectus, the Prospectus most recently filed with the Commission before the time of this Agreement, including any preliminary prospectus supplement deemed to be a part thereof, and any description of the transaction provided by the Representative on behalf of the Underwriters included on Schedule II.

For purposes of this Agreement, all references to the Registration Statement, the Rule 462 Registration Statement, the Base Prospectus, the Final Prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to its Interactive Data Electronic Applications system. All references in this Agreement to amendments or supplements to the Registration Statement, the Rule 462 Registration Statement, the Base Prospectus, the Final Prospectus or the Prospectus shall be deemed to mean and include the subsequent filing of any document under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that is deemed to be incorporated therein by reference therein or otherwise deemed by the Rules and Regulations to be a part thereof.

2. Representations and Warranties of the Company Regarding the Offering.

(a) The Company represents and warrants to, and agrees with, the Underwriters for whom you are acting as Representative, as of the date hereof and as of the Closing Date (as defined in Section 5(b) below), except as otherwise indicated, as follows:

(i) At each time of effectiveness, at the date hereof and at the Closing Date, the Registration Statement and any post-effective amendment thereto, complied or will comply in all material respects with the requirements of the Securities Act and the Rules and Regulations and did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. The Time of Sale Disclosure Package as of the date hereof and at the Closing Date, any roadshow or investor presentations delivered to and approved by the Representative for use in connection with the marketing of the Shares (the “Marketing Materials”) as of the time of their use and at the Closing Date, and the Final Prospectus, as amended or supplemented, as of its date, at the time of filing pursuant to Rule 424(b) under the Securities Act and at the Closing Date, did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading. The representations and warranties set forth in the two immediately preceding sentences shall not apply to statements in or omissions from the Registration Statement or any post-effective amendment thereto or any Prospectus in reliance upon, and in conformity with, written

information furnished to the Company by the Representative on behalf of the Underwriters specifically for use in the preparation thereof, which written information is described in Section 8(h). The Registration Statement contains all exhibits and schedules required to be filed by the Securities Act or the Rules and Regulations. No order preventing or suspending the effectiveness or use of the Registration Statement or any Prospectus is in effect and no proceedings for such purpose have been instituted or are pending, or, to the knowledge of the Company, are contemplated or threatened by the Commission.

(ii) The Company has not distributed any prospectus or other offering material in connection with the offering and sale of the Shares other than the Time of Sale Disclosure Package and the Marketing Materials.

(iii) At the time of filing of the Registration Statement and at the date hereof, the Company is an “ineligible issuer,” as defined in Rule 405 under the Securities Act but is not an “excluded issuer” as defined in Rule 164 under the Securities Act.

(iv) The financial statements of the Company, together with the related notes, included in the Registration Statement, the Time of Sale Disclosure Package and the Final Prospectus comply in all material respects with the applicable requirements of the Securities Act and the Exchange Act and fairly present the consolidated financial condition of the Company and its Subsidiaries (as defined below) as of the dates indicated and the consolidated results of operations and changes in cash flows for the periods therein specified in conformity with generally accepted accounting principles consistently applied throughout the periods involved; and the supporting schedules included in the Registration Statement present fairly the information required to be stated therein. No other financial statements, pro forma financial information or schedules are required under the Securities Act to be included in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus. To the Company’s knowledge, Deloitte & Touche LLP, which has expressed its opinion with respect to the financial statements and schedules filed as a part of the Registration Statement and included in the Registration Statement, the Time of Sale Disclosure Package and the Final Prospectus is an independent public accounting firm with respect to the Company within the meaning of the Securities Act and the Rules and Regulations.

(v) The Company had a reasonable basis for, and made in good faith, each “forward-looking statement” (within the meaning of Section 27A of the Act or Section 21E of the Exchange Act) contained in the Registration Statement, the Time of Sale Disclosure Package, the Final Prospectus or the Marketing Materials.

(vi) All statistical or market-related data included in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus, or included in the Marketing Materials, are based on or derived from sources that the Company reasonably believes to be reliable and accurate, and the Company has obtained the written consent to the use of such data from such sources, to the extent required.

(vii) The Common Stock is registered pursuant to Section 12(g) of the Exchange Act and is approved for quotation on the OTC Bulletin Board (the “OTC”). There is no action pending by the Company or, to the Company’s knowledge, the OTC to exclude the Common Stock from the OTC, nor has the Company received any notification that the OTC is currently contemplating terminating such quotation.

(viii) The Company has not taken, directly or indirectly, any action that is designed to or that has constituted or that would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

(ix) The Company is not and during the past three years neither the Company nor any predecessor was: (A) a blank check company as defined in Rule 419(a)(2) of the Securities Act or (B) an issuer for an offering of penny stock as defined in Rule 3a51-1 of the Exchange Act.

(x) The Company is not and, after giving effect to the offering and sale of the Shares and the application of the net proceeds thereof, will not be an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended.

(b) Any certificate signed by any officer of the Company and delivered to the Representative or to the Underwriters’ counsel shall be deemed a representation and warranty by the Company to the Underwriters as to the matters covered thereby.

3. Representations and Warranties Regarding the Company.

(a) The Company represents and warrants to and agrees with, the Underwriters for whom you are acting as Representative, except as set forth in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus, as follows:

(i) The Company has been duly organized and is validly existing as a corporation in good standing under the laws of its jurisdiction of incorporation. The Company has the corporate power and authority to own its properties and conduct its business as currently being carried on and as described in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus, and is duly qualified to do business as a foreign corporation in good standing in each jurisdiction in which it owns or leases real property or in which the conduct of its business makes such qualification necessary and in which the failure to so qualify would have or is reasonably likely to result in a material adverse effect upon the business, prospects, properties, operations, condition (financial or otherwise) or results of operations of the Company and its subsidiaries (as defined below), taken as a whole, or in its ability to perform its obligations under this Agreement (“Material Adverse Effect”). The Company has no subsidiaries (as defined under the Securities Act) other than those subsidiaries listed on Exhibit 21.1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2009 (collectively, the “subsidiaries”); except as disclosed in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus, (i) the Company owns, directly or indirectly, all of the issued and outstanding capital stock of each of the subsidiaries and (ii) the Company does not own, directly or indirectly, any shares of stock or any other

equity interests or long-term debt securities of any corporation, firm, partnership, joint venture, association or other entity; complete and correct copies of the charters and the bylaws of the Company and all of the “significant subsidiaries” as set forth below and all amendments thereto have been made available to the Representative, and no changes therein will be made on or after the date hereof through and including the Time of Sale; each subsidiary has been incorporated or organized and is validly existing as a corporation or limited liability company, as the case may be, in good standing under the laws of the jurisdiction of its incorporation or organization, with full power and authority to own, lease and operate its properties and to conduct its business as described in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus; each subsidiary is qualified to do business as a foreign corporation or a limited liability company, as the case may be, and is in good standing in each jurisdiction where the ownership or leasing of its properties or the conduct of its business requires such qualification, except where the failure to be so qualified and in good standing would not, individually or in the aggregate, have a Material Adverse Effect; except as disclosed in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus, all of the outstanding shares of capital stock of each of the subsidiaries have been duly authorized and validly issued, are fully paid and non-assessable, have been issued in compliance with all applicable securities laws, were not issued in violation of any preemptive right, resale right, right of first refusal or similar right and are owned by the Company subject to no security interest, other encumbrance or adverse claims; and except as disclosed in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus, no options, warrants or other rights to purchase, agreements or other obligations to issue or other rights to convert any obligation into shares of capital stock or ownership interests in the subsidiaries are outstanding. Except for the subsidiaries, the Company does not own, directly or indirectly, any capital stock or other ownership interest in any partnership, corporation, business trust, limited liability company, limited liability partnership, joint stock company, trust, unincorporated association, joint venture or other entity.

(ii) The Company has the power and authority to enter into this Agreement. This Agreement has been duly authorized, executed and delivered by the Company, and constitutes a valid, legal and binding obligation of the Company, enforceable against the Company in accordance with its terms, except as rights to indemnity hereunder may be limited by federal or state securities laws and except as such enforceability may be limited by bankruptcy, insolvency, reorganization or similar laws affecting the rights of creditors generally and subject to general principles of equity.

(iii) The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated will not (A) result in a breach or violation of any of the terms and provisions of, or constitute a default under, any law, rule or regulation to which the Company or any subsidiary is subject, or by which any property or asset of the Company or any subsidiary is bound or affected, (B) conflict with, result in any violation or breach of, or constitute a default (or an event that with notice or lapse of time or both would become a default) under, or give to others any right of termination, amendment, acceleration or cancellation (with or without notice, lapse of time or both) of, any agreement, lease, credit facility, debt, note, bond, mortgage,

indenture or other instrument (the “Contracts”) or obligation or other understanding to which the Company or any subsidiary is a party of by which any property or asset of the Company or any subsidiary is bound or affected, except to the extent that such conflict, default, termination, amendment, acceleration or cancellation right is not reasonably likely to result in a Material Adverse Effect, or (C) result in a breach or violation of any of the terms and provisions of, or constitute a default under, the Company’s charter or by-laws.

(iv) Neither the Company nor any of its subsidiaries is in violation, breach or default under its certificate of incorporation, by-laws or other equivalent organizational or governing documents, except where the violation, breach or default in the case of a subsidiary of the Company is not reasonably likely to result in a Material Adverse Effect.

(v) All consents, approvals, orders, authorizations and filings required on the part of the Company and its subsidiaries in connection with the execution, delivery or performance of this Agreement have been obtained or made, other than such consents, approvals, orders and authorizations the failure of which to make or obtain is not reasonably likely to result in a Material Adverse Effect.

(vi) All of the issued and outstanding shares of capital stock of the Company are duly authorized and validly issued, fully paid and nonassessable, and have been issued in compliance with all applicable securities laws, and conform to the description thereof in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus. Except for the issuances of options or restricted stock in the ordinary course of business, since the respective dates as of which information is provided in the Registration Statement, the Time of Sale Disclosure Package or the Prospectus, the Company has not entered into or granted any convertible or exchangeable securities, options, warrants, agreements, contracts or other rights in existence to purchase or acquire from the Company any shares of the capital stock of the Company. The Shares are duly authorized and validly issued, fully paid and nonassessable, and in compliance with all applicable securities laws, and are free of preemptive, registration or similar rights.

(vii) Each of the Company and its subsidiaries has filed all returns (as hereinafter defined) required to be filed with taxing authorities prior to the date hereof or has duly obtained extensions of time for the filing thereof. Each of the Company and its subsidiaries has paid all taxes (as hereinafter defined) shown as due on such returns that were filed and has paid all taxes imposed on or assessed against the Company or such respective subsidiary. The provisions for taxes payable, if any, shown on the financial statements filed with or as part of the Registration Statement are sufficient for all accrued and unpaid taxes, whether or not disputed, and for all periods to and including the dates of such consolidated financial statements. Except as disclosed in writing to the Underwriters, (i) no issues have been raised (and are currently pending) by any taxing authority in connection with any of the returns or taxes asserted as due from the Company or its subsidiaries, and (ii) no waivers of statutes of limitation with respect to the returns or collection of taxes have been given by or requested from the Company or

its subsidiaries. The term “taxes” mean all federal, state, local, foreign, and other net income, gross income, gross receipts, sales, use, ad valorem, transfer, franchise, profits, license, lease, service, service use, withholding, payroll, employment, excise, severance, stamp, occupation, premium, property, windfall profits, customs, duties or other taxes, fees, assessments, or charges of any kind whatever, together with any interest and any penalties, additions to tax, or additional amounts with respect thereto. The term “returns” means all returns, declarations, reports, statements, and other documents required to be filed in respect to taxes.

(viii) Since the respective dates as of which information is given in the Registration Statement, the Time of Sale Disclosure Package or the Prospectus, (a) neither the Company nor any of its subsidiaries has incurred any material liabilities or obligations, direct or contingent, or entered into any material transactions other than in the ordinary course of business, (b) the Company has not declared or paid any dividends or made any distribution of any kind with respect to its capital stock; (c) there has not been any change in the capital stock of the Company or any of its subsidiaries (other than a change in the number of outstanding shares of Common Stock due to the issuance of shares upon the exercise of outstanding options or warrants or the issuance of restricted stock awards or restricted stock units under the Company’s existing stock awards plan, or any new grants thereof in the ordinary course of business), (d) there has not been any material change in the Company’s long-term or short-term debt, and (e) there has not been the occurrence of any Material Adverse Effect.

(ix) There is not pending or, to the knowledge of the Company, threatened, any action, suit or proceeding to which the Company or any of its subsidiaries is a party or of which any property or assets of the Company or its subsidiaries is the subject before or by any court or governmental agency, authority or body, or any arbitrator or mediator, which is reasonably likely to result in a Material Adverse Effect.

(x) The Company and each of its subsidiaries holds, and is in compliance with, all franchises, grants, authorizations, licenses, permits, easements, consents, certificates and orders (“Permits”) of any governmental or self-regulatory agency, authority or body required for the conduct of its business, and all such Permits are in full force and effect, in each case except where the failure to hold, or comply with, any of them is not reasonably likely to result in a Material Adverse Effect.

(xi) The Company and its subsidiaries have good and marketable title to all property (whether real or personal) described in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus as being owned by them that are material to the business of the Company, in each case free and clear of all liens, claims, security interests, other encumbrances or defects, except those that are not reasonably likely to result in a Material Adverse Effect. The property held under lease by the Company and its subsidiaries is held by them under valid, subsisting and enforceable leases with only such exceptions with respect to any particular lease as do not interfere in any material respect with the conduct of the business of the Company and its subsidiaries.

(xii) The Company and each of its subsidiaries owns or possesses or has valid right to use all patents, patent applications, trademarks, service marks, trade names, trademark registrations, service mark registrations, copyrights, licenses, inventions, trade secrets and similar rights (“Intellectual Property”) necessary for the conduct of the business of the Company and its subsidiaries as currently carried on and as described in the Registration Statement, the Time of Sale Disclosure Package and the Prospectus. To the knowledge of the Company, no action or use by the Company or any of its subsidiaries will involve or give rise to any infringement of, or license or similar fees for, any Intellectual Property of others, except where such action, use, license or fee is not reasonably likely to result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries has received any notice alleging any such infringement or fee.

(xiii) The Company and each of its subsidiaries has complied with, is not in violation of, and has not received any notice of violation relating to any law, rule or regulation relating to the conduct of its business, or the ownership or operation of its property and assets, including, without limitation, (A) the Currency and Foreign Transactions Reporting Act of 1970, as amended, or any money laundering laws, rules or regulations, (B) any laws, rules or regulations related to health, safety or the environment, including those relating to the regulation of hazardous substances, (C) the Sarbanes-Oxley Act and the rules and regulations of the Commission thereunder, (D) the Foreign Corrupt Practices Act of 1977 and the rules and regulations thereunder, and (E) the Employment Retirement Income Security Act of 1974 and the rules and regulations thereunder, in each case except where the failure to be in compliance is not reasonably likely to result in a Material Adverse Effect.

(xiv) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, employee, representative, agent or affiliate of the Company or any of its subsidiaries is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly use the proceeds of the offering of the Shares contemplated hereby, or lend, contribute or otherwise make available such proceeds to any person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

(xv) The Company and each of its subsidiaries carries, or is covered by, insurance in such amounts and covering such risks as is adequate for the conduct of its business and the value of its properties and as is customary for companies engaged in similar businesses in similar industries.

(xvi) No labor dispute with the employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is imminent that is reasonably likely to result in a Material Adverse Effect.

(xvii) Neither the Company, its subsidiaries nor, to its knowledge, any other party is in violation, breach or default of any Contract that is reasonably likely to result in a Material Adverse Effect.

(xviii) No supplier, customer, distributor or sales agent of the Company has notified the Company that it intends to discontinue or decrease the rate of business done with the Company, except where such decrease is not reasonably likely to result in a Material Adverse Effect.

(xix) There are no claims, payments, issuances, arrangements or understandings for services in the nature of a finder’s, consulting or origination fee with respect to the introduction of the Company to the Underwriters or the sale of the Shares hereunder or any other arrangements, agreements, understandings, payments or issuances with respect to the Company that may affect the Underwriters’ compensation, as determined by the Financial Institutions Regulatory Authority, Inc. (“FINRA”).

(xx) Except as disclosed to the Underwriters in writing, the Company has not made any direct or indirect payments (in cash, securities or otherwise) to (i) any person, as a finder’s fee, investing fee or otherwise, in consideration of such person raising capital for the Company or introducing to the Company persons who provided capital to the Company, (ii) any FINRA member, or (iii) any person or entity that has any direct or indirect affiliation or association with any FINRA member within the 12-month period prior to the date on which the Registration Statement was filed with the Commission (“Filing Date”) or thereafter.

(xxi) None of the net proceeds of the offering will be paid by the Company to any participating FINRA member or any affiliate or associate of any participating FINRA member, except as specifically authorized herein.

(xxii) Except as disclosed to the Underwriters in writing, to the Company’s knowledge, no (i) officer or director of the Company or its subsidiaries, (ii) owner of 5% or more of the Company’s unregistered securities or that of its subsidiaries or (iii) owner of any amount of the Company’s unregistered securities acquired within the 180-day period prior to the Filing Date, has any direct or indirect affiliation or association with any FINRA member. The Company will advise the Representative and counsel to the Underwriters if it becomes aware that any officer, director or stockholder of the Company or its subsidiaries is or becomes an affiliate or associated person of a FINRA member participating in the offering.

(xxiii) Other than the Underwriters, no person has the right to act as a placement agent, an underwriter or as a financial advisor to the Company in connection with the transactions contemplated hereby.

4. Representations and Warranties of the Selling Stockholder

(a) The Selling Stockholder represents and warrants to, and agrees with, the Underwriters for whom you are acting as Representative as follows:

(i) This Agreement has been duly authorized, executed and delivered by such Selling Stockholder, and constitutes a valid, legal and binding obligation of such Selling Stockholder, enforceable in accordance with its terms, except as rights to indemnity hereunder may be limited by federal or state securities laws and except as such enforceability may be limited by bankruptcy, insolvency, reorganization or similar laws

affecting the rights of creditors generally and subject to general principles of equity. The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, any statute, agreement or instrument to which the Selling Stockholder is a party or by which it is bound or to which any of its property is subject, or any order, rule, regulation or decree of any court or governmental agency or body having jurisdiction over the Selling Stockholder or any of its properties, except for violations and defaults that individually or in the aggregate would not reasonably be expected to have a Material Adverse Effect. The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, the Selling Stockholder’s charter or by-laws. No consent, approval, authorization or order of, or filing with, any court or governmental agency or body is required for the execution, delivery and performance of this Agreement or for the consummation of the transactions contemplated hereby, including the sale of the Shares by the Selling Stockholder, except as may be required under the Securities Act or state securities or blue sky laws; and the Selling Stockholder has the power and authority to enter into this Agreement and to sell the Shares as contemplated by this Agreement.

(ii) Such Selling Stockholder is, on the date hereof, the record and beneficial owner of all of the Shares to be sold by the Selling Stockholder hereunder free and clear of all liens, encumbrances, equities and claims and has duly indorsed such Shares in blank or has duly signed a stock power assigning all right, title and interest to the Shares to be sold by such Selling Stockholder, with all signatures appropriately guaranteed by an eligible guarantor institution with membership in an approved medallion guaranty program pursuant to Rule 17Ad-15 under the Exchange Act.

(iii) On the Closing Date, all stock transfer or other taxes (other than income taxes) that are required to be paid in connection with the sale and transfer by the Selling Stockholder of the Shares will be fully paid or provided for by such Selling Stockholder and all laws imposing such taxes will be fully complied with.

(iv) The Selling Stockholder, directly or indirectly, has not entered into any commitment, transaction or other arrangement, including any prepaid forward contract, 10b5-1 plan or similar agreement, which transfers or may transfer any of the legal or beneficial ownership or any of the economic consequences of ownership of the Shares, except as has been previously disclosed in writing to the Representative.

(v) The Selling Stockholder represents and warrants that it has not prepared or had prepared on its behalf or used or referred to any “free writing prospectus” (as defined in Rule 405 of the Act) and further represents that it has not distributed and will not distribute any written materials in connection with the offer or sale of the Shares that could otherwise constitute a “free writing prospectus” (as defined in Rule 405 of the Act) required to be filed with the Commission or retained under Rule 433 of the Act.

(vi) All information relating to the Selling Stockholder contained in the Registration Statement, the Time of Sale Disclosure Package or any Prospectus, as the case may be, is as of the applicable Closing Date, true, correct, and complete in all material respects, and does not, and will not, contain any untrue statement of a material fact or omit to state any material fact necessary to make such information not misleading. In addition, the Selling Stockholder confirms as accurate the number of shares of Common Stock set forth opposite the Selling Stockholder’s name in the Time of Sale Disclosure Package and any Prospectus under the caption “Selling Stockholder” (both prior to and after giving effect to the sale of the Shares).

(vii) The Selling Stockholder has not taken and will not take, directly or indirectly, any action designed to or that might be reasonably expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

(b) Any certificate signed by any officer of the Selling Stockholder and delivered to the Representative or to counsel to the Underwriters shall be deemed a representation and warranty by such Selling Stockholder to the Underwriters as to the matters covered thereby.

5. Purchase, Sale and Delivery of Shares.

(a) On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, the Selling Stockholder agrees to sell the Shares to the Underwriters, and the Underwriters agree, severally and not jointly, to purchase the Shares from the Selling Stockholder set forth opposite its name on Schedule I hereto. The pricing terms of the purchase of the Shares by the Underwriters and the pricing terms of the offering of the Shares to the public are as set forth in Schedule I hereto.

(b) The Shares will be delivered by the Selling Stockholder to the Underwriters against payment of the purchase price therefor by wire transfer of same day funds payable to the order of the Selling Stockholder at the offices of Roth Capital Partners, LLC, 24 Corporate Plaza, Newport Beach, CA 92660, or such other location as may be mutually acceptable, at 6:00 a.m. PST on the third (or if the Shares are priced, as contemplated by Rule 15c6-1(c) under the Exchange Act, after 4:30 p.m. Eastern time, the fourth) full business day following the date hereof, or at such other time and date as the Representative and the Selling Stockholder determine pursuant to Rule 15c6-1(a) under the Exchange Act. The time and date of delivery of the Shares is referred to herein as the “Closing Date.” If the Representative so elects, delivery of the Shares may be made by credit through full FAST transfer to the accounts at The

Depository Trust Company designated by the Representative on behalf of the Underwriters. Certificates representing the Shares, in definitive form and in such denominations and registered in such names as the Underwriters may request upon at least two business days’ prior notice to the Company, will be made available for checking and packaging not later than 10:30 a.m. PDT on the business day next preceding the Closing Date at the above addresses, or such other location as may be mutually acceptable.

6. Covenants.

(a) The Company covenants and agrees with the Underwriters for whom you are acting as Representative as follows:

(i) During the period beginning on the date hereof and ending on the later of the Closing Date or such date as determined by the Representative that the Prospectus is no longer required by law to be delivered in connection with sales by an underwriter or dealer (the “Prospectus Delivery Period”), prior to amending or supplementing the Registration Statement, including any Rule 462 Registration Statement, the Time of Sale Disclosure Package or the Prospectus, the Company shall furnish to the Representative for review and comment a copy of each such proposed amendment or supplement, and the Company shall not file any such proposed amendment or supplement to which the Representative reasonably objects.

(ii) From the date of this Agreement until the end of the Prospectus Delivery Period, the Company shall promptly advise the Representative in writing (A) of the receipt of any comments of, or requests for additional or supplemental information from, the Commission, (B) of the time and date of any filing of any post-effective amendment to the Registration Statement or any amendment or supplement to the Time of Sale Disclosure Package or the Prospectus, (C) of the time and date that any post-effective amendment to the Registration Statement becomes effective and (D) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or of any order preventing or suspending its use or the use of the Time of Sale Disclosure Package, or of any proceedings to remove, suspend or terminate from listing or quotation the Common Stock from any securities exchange upon which it is listed for trading or included or designated for quotation, or of the threatening or initiation of any proceedings for any of such purposes. If the Commission shall enter any such stop order at any time during the Prospectus Delivery Period, the Company will use its reasonable efforts to obtain the lifting of such order at the earliest possible moment. Additionally, the Company agrees that it shall comply with the provisions of Rules 424(b), 430A and 430B, as applicable, under the Securities Act and will use its reasonable efforts to confirm that any filings made by the Company under Rule 424(b) or Rule 433 were received in a timely manner by the Commission (without reliance on Rule 424(b)(8) or Rule 164(b) of the Securities Act).

(iii) During the Prospectus Delivery Period, the Company will comply with all requirements imposed upon it by the Securities Act, as now and hereafter amended, and by the Rules and Regulations, as from time to time in force, and by the Exchange Act, as now and hereafter amended, so far as necessary to permit the

continuance of sales of or dealings in the Shares as contemplated by the provisions hereof, the Registration Statement, the Time of Sale Disclosure Package and the Prospectus. If during such period any event occurs the result of which the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Time of Sale Disclosure Package) would include an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances then existing, not misleading, or if during such period it is necessary or appropriate in the opinion of the Company or its counsel or the Representative or counsel to the Underwriters to amend the Registration Statement or supplement the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Time of Sale Disclosure Package) to comply with the Securities Act, the Company will promptly notify the Representative, allow the Representative the opportunity to provide reasonable comments on such amendment, Prospectus supplement or document, and will amend the Registration Statement or supplement the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Time of Sale Disclosure Package) so as to correct such statement or omission or effect such compliance.

(iv) The Company shall take or cause to be taken all necessary action to qualify the Shares for sale under the securities laws of such jurisdictions as the Representative reasonably designates and to continue such qualifications in effect so long as required for the distribution of the Shares, except that the Company shall not be required in connection therewith to qualify as a foreign corporation or as a dealer in securities in any jurisdiction in which it is not so qualified, to execute a general consent to service of process in any state or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise subject.

(v) The Company will furnish to the Representative and counsel for the Underwriters copies of the Registration Statement and each Prospectus, and all amendments and supplements to such documents, in each case as soon as available and in such quantities as the Representative may from time to time reasonably request.

(vi) The Company will make generally available to its security holders as soon as practicable, but in any event not later than 15 months after the end of the Company’s current fiscal quarter, an earnings statement (which need not be audited) covering a 12-month period that shall satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 of the Rules and Regulations.

(vii) The Company, whether or not the transactions contemplated hereunder are consummated or this Agreement is terminated, will pay or cause to be paid (A) all expenses (including transfer taxes allocated to the respective transferees) incurred in connection with the delivery to the Underwriters of the Shares, (B) all expenses and fees (including, without limitation, fees and expenses of the Company’s counsel) in connection with the preparation, printing, filing, delivery, and shipping of the Registration Statement (including the financial statements therein and all amendments, schedules, and exhibits thereto), the Shares, the Time of Sale Disclosure Package and the Prospectus and any amendment thereof or supplement thereto, (C) all reasonable filing fees and reasonable fees and

disbursements of the Company’s counsel incurred in connection with the qualification of the Shares for offering and sale by the Underwriters or by dealers under the securities or blue sky laws of the states and other jurisdictions that the Representative shall designate, (D) the fees and expenses of any transfer agent or registrar, (E) the reasonable filing fees and reasonable fees and disbursements of Underwriters’ counsel incident to any required review and approval by FINRA, of the terms of the sale of the Shares, (F) listing fees, if any, and (G) all other costs and expenses incident to the performance of its obligations hereunder that are not otherwise specifically provided for herein. In addition to the foregoing, the Company will reimburse the Underwriters for their customary out-of-pocket expenses incurred by them in connection with the purchase and sale of the Shares hereunder (including, without limitation, the reasonable fees and disbursements of Underwriters’ counsel to the extent not covered by clauses (C) and (E) above), up to an aggregate of $75,000. If this Agreement is terminated by the Representative in accordance with the provisions of Section 8 or Section 11 hereof, the Company will reimburse the Underwriters for all out-of-pocket disbursements (including, but not limited to, reasonable fees and disbursements of counsel, printing expenses, travel expenses, postage, facsimile and telephone charges) incurred by the Underwriters in connection with their investigation, preparing to market and marketing the Shares or in contemplation of performing their obligations hereunder.

(viii) The Company has not taken and will not take, directly or indirectly, during the Prospectus Delivery Period, any action designed to or which might reasonably be expected to cause or result in, or that has constituted, the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

(ix) The Company represents and agrees that, and each of the Underwriters for whom you are acting as Representative represents and agrees that, it has not made and will not make any offer relating to the Shares that would constitute an “issuer free writing prospectus” as defined in Rule 433.

(x) The Company hereby agrees that, without the prior written consent of the Representative, it will not, during the period ending 90 days after the date hereof (“Lock-Up Period”), (i) offer, pledge, issue, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock; or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or such other securities, in cash or otherwise; or (iii) file any registration statement with the Commission relating to the offering of any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock. The restrictions contained in the preceding sentence shall not apply to (1) the Shares to be sold hereunder, (2) the issuance of Common Stock upon the exercise of options or warrants disclosed as outstanding in the Registration Statement (excluding exhibits thereto) or the Prospectus, (3) the adoption of a stockholder rights plan including customary terms and conditions, or (4) the issuance of employee stock options not exercisable during the Lock-Up Period and the grant of restricted stock awards or restricted stock units pursuant to equity incentive plans described in the

Registration Statement (excluding exhibits thereto) and the Prospectus. Notwithstanding the foregoing, if (x) the Company issues an earnings release or material news, or a material event relating to the Company occurs, during the last 17 days of the Lock-Up Period, or (y) prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the Lock-Up Period, the restrictions imposed by this clause shall continue to apply until the expiration of the 18-day period beginning on the issuance of the earnings release or the occurrence of the material news or material event, unless the Representative waives such extension in writing.

(b) The Selling Stockholder covenants and agrees with the Underwriters for whom you are acting as Representative as follows:

(i) Subject to the terms of its agreement with the Company, the Selling Stockholder, whether or not the transactions contemplated hereunder are consummated or this Agreement is terminated, will pay or cause to be paid all expenses (including transfer taxes allocated to the respective transferees) incurred in connection with the delivery to the Underwriters of the Shares to be sold by the Selling Stockholder hereunder.

(ii) The Selling Stockholder hereby agrees that, without the prior written consent of the Representative, it will not, during the Lock-Up Period, (i) offer, pledge, sell, contract to sell, purchase, contract to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock; or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or such other securities, in cash or otherwise. The restrictions contained in the preceding sentence shall not apply to (1) the Shares to be sold hereunder, (2) the issuance of Common Stock upon the exercise of options or warrants disclosed as outstanding in the Registration Statement (excluding exhibits thereto) or the Prospectus, (3) the issuance of employee stock options not exercisable during the Lock-Up Period and the grant of restricted stock pursuant to equity incentive plans described in the Registration Statement (excluding exhibits thereto) and the Prospectus. Notwithstanding the foregoing, if (x) the Company issues an earnings release or material news, or a material event relating to the Company occurs, during the last 17 days of the Lock-Up Period, or (ii) prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the Lock-Up Period, the restrictions imposed by this clause shall continue to apply until the expiration of the 18-day period beginning on the issuance of the earnings release or the occurrence of the material news or material event, unless the Representative waives such extension in writing.

(iii) The Selling Stockholder will deliver to the Representative prior to the applicable Closing Date a properly completed and executed United States Treasury Department Form W-9.

(iv) During the Prospectus Delivery Period, the Selling Stockholder will advise the Representative promptly, and if requested by the Representative, will confirm such advice in writing, of any change in information relating to the Selling Stockholder in the Registration Statement, the Time of Sale Disclosure Package or any Prospectus.

(v) The Selling Stockholder agrees that it will not prepare or have prepared on its behalf or use or refer to any “free writing prospectus” (as such term is defined in Rule 405 under the Act), and agrees that it will not distribute any written materials in connection with the offer or sale of the Shares.

7. Conditions of the Underwriters’ Obligations. The obligations of the Underwriters hereunder are subject to the accuracy, as of the date hereof and at the Closing Date (as if made at the Closing Date), of and compliance with all representations, warranties and agreements of the Company and the Selling Stockholder contained herein, the performance by the Company and the Selling Stockholder of their respective obligations hereunder and the following additional conditions:

(a) If filing of the Prospectus, or any amendment or supplement thereto is required under the Securities Act or the Rules and Regulations, the Company shall have filed the Prospectus (or such amendment or supplement) with the Commission in the manner and within the time period so required (without reliance on Rule 424(b)(8) or Rule 164(b) under the Securities Act); the Registration Statement shall remain effective; no stop order suspending the effectiveness of the Registration Statement or any part thereof, any Rule 462 Registration Statement, or any amendment thereof, nor suspending or preventing the use of the Time of Sale Disclosure Package or the Prospectus shall have been issued; no proceedings for the issuance of such an order shall have been initiated or threatened; any request of the Commission or the Representative for additional information (to be included in the Registration Statement, the Time of Sale Disclosure Package, the Prospectus or otherwise) shall have been complied with to the Representative’s satisfaction.

(b) FINRA shall have raised no objection to the fairness and reasonableness of the underwriting terms and arrangements.

(c) The Representative shall not have reasonably determined and advised the Company that the Registration Statement, the Time of Sale Disclosure Package or the Prospectus, or any amendment thereof or supplement thereto, contains an untrue statement of fact which, in the Representative’s reasonable opinion, is material, or omits to state a fact which, in the Representative’s reasonable opinion, is material and is required to be stated therein or necessary to make the statements therein not misleading.

(d) On or after the date hereof (i) no downgrading shall have occurred in the rating accorded any of the Company’s securities by any “nationally recognized statistical organization,” as that term is defined by the Commission for purposes of Rule 436(g)(2) under the Securities Act, and (ii) no such organization shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of any of the Company’s securities.

(e) On the Closing Date, there shall have been furnished to the Underwriters the opinion and negative assurance letters of Morgan, Lewis & Bockius LLP, dated the Closing Date and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representative, to the effect set forth in Schedule III.

(f) On the Closing Date, there shall have been furnished to the Underwriters the negative assurance letter of Lowenstein Sandler PC, dated the Closing Date and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representative.

(g) On the Closing Date, there shall have been furnished to the Underwriters the opinion of legal counsel to the Selling Stockholder (or its corporate parent), which counsel may be in-house counsel to the Selling Stockholder, dated the Closing Date and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representative, to the effect set forth in Schedule IV.

(h) The Underwriters shall have received a letter of Deloitte & Touche LLP, on the date hereof and on the Closing Date addressed to the Underwriters, confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualifications of accountants under Rule 2-01 of Regulation S-X of the Commission, and confirming, as of the date of each such letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Time of Sale Disclosure Package, as of a date not prior to the date hereof or more than five days prior to the date of such letter), the conclusions and findings of said firm with respect to the financial information and other matters required by the Representative.

(i) On the Closing Date, there shall have been furnished to the Underwriters a certificate, dated the Closing Date and addressed to the Underwriters, signed by the chief executive officer and the chief financial officer of the Company, in their capacity as officers of the Company, to the effect that:

(i) The representations and warranties of the Company in this Agreement that are qualified by materiality or by reference to any Material Adverse Effect are true and correct in all respects, and all other representations and warranties of the Company in this Agreement are true and correct, in all material respects, as if made at and as of the Closing Date, and the Company has complied with all the agreements and satisfied all the conditions on its part to be performed or satisfied at or prior to the Closing Date;

(ii) No stop order or other order (A) suspending the effectiveness of the Registration Statement or any part thereof or any amendment thereof, (B) suspending the qualification of the Shares for offering or sale, or (C) suspending or preventing the use of the Time of Sale Disclosure Package or the Prospectus, has been issued, and no proceeding for that purpose has been instituted or, to their knowledge, is contemplated by the Commission or any state or regulatory body; and

(iii) There has been no occurrence of any event resulting or reasonably likely to result in a Material Adverse Effect during the period from and after the date of this Agreement and prior to the Closing Date.

(j) On the Closing Date, there shall have been furnished to the Underwriters certificates, dated the Closing Date and addressed to the Underwriters, signed by the Selling Stockholder, to the effect that the representations and warranties of the Selling Stockholder in this Agreement are true and correct, in all material respects, as if made at and as of the Closing Date, and the Selling Stockholder has complied with all the agreements and satisfied all the conditions on its part to be performed or satisfied at or prior to the Closing Date;

(k) On or before the date hereof, the Representative shall have received from each of the directors and executive officers of the Company listed on Schedule V duly executed “lock-up” agreements, in the form attached hereto in Schedule VI.

(l) The Company and the Selling Stockholder shall have furnished to the Underwriters and their counsel such additional documents, certificates and evidence as the Representative or Underwriters’ counsel may have reasonably requested.

If any condition specified in this Section 8 shall not have been fulfilled when and as required to be fulfilled, this Agreement may be terminated by the Representative by notice to the Company and the Selling Stockholder at any time at or prior to the Closing Date and such termination shall be without liability of any party to any other party, except that Section 6(a)(vii), Section 8 and Section 9 shall survive any such termination and remain in full force and effect.

8. Indemnification and Contribution.

(a) The Company agrees to indemnify, defend and hold harmless each Underwriter, its respective affiliates, directors and officers and employees, and each person, if any, who controls an Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any losses, claims, damages or liabilities to which such Underwriter or such person may become subject, under the Securities Act or otherwise (including in settlement of any litigation if such settlement is effected with the written consent of the Company), insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon (i) an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, including the information deemed to be a part of the Registration Statement at the time of effectiveness and at any subsequent time pursuant to Rules 430A and 430B of the Rules and Regulations, or arise out of or are based upon the omission from the Registration Statement, or alleged omission to state therein, a material fact required to be stated therein or necessary to make the statements therein not misleading (ii) an untrue statement or alleged untrue statement of a material fact contained in the Time of Sale Disclosure Package, the Prospectus, or any amendment or supplement thereto, or the Marketing Materials or in any other materials used in connection with the offering of the Shares, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, (iii) in whole or in part, any inaccuracy in the representations and warranties of the Company contained herein, or (iv) in whole or in part, any failure of the Company to perform its obligations hereunder or under law, and will reimburse

each Underwriter for any legal or other expenses reasonably incurred by it in connection with evaluating, investigating or defending against such loss, claim, damage, liability or action; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Time of Sale Disclosure Package, the Prospectus, or any amendment or supplement thereto, in reliance upon and in conformity with written information furnished to the Company by the Representative on behalf of such Underwriter specifically for use in the preparation thereof, which written information is described in Section 8(h).

(b) The Selling Stockholder will indemnify, defend and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon (i) an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Prospectus, or any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, (ii) in whole or in part, any inaccuracy in the representations and warranties of the Selling Stockholder contained herein, or (iii) in whole or in part, any failure of the Selling Stockholder to perform its obligations hereunder or under law, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by it in connection with evaluating, investigating or defending against such loss, claim, damage, liability or action; provided, however, that the Selling Stockholder shall be liable in any such case to the extent, but only to the extent, that any such loss, claim, damage, liability or action arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Time of Sale Disclosure Package, the Prospectus, or any amendment or supplement thereto in reliance upon and in conformity with written information furnished to the Company by the Selling Stockholder specifically for use in the preparation thereof, which written information is described in Section 8(i).

(c) Each Underwriter, severally and not jointly, will indemnify, defend and hold harmless the Company and the Selling Stockholder, their respective affiliates, directors, officers and employees, and each person, if any, who controls the Company or the Selling Stockholder within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any losses, claims, damages or liabilities to which the Company or a Selling Stockholder may become subject, under the Securities Act or otherwise (including in settlement of any litigation, if such settlement is effected with the written consent of such Underwriter), insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Time of Sale Disclosure Package, the Prospectus, or any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, the Time of Sale Disclosure Package, the Prospectus, or any amendment or supplement thereto in reliance upon and in conformity with written information furnished to

the Company by the Representative on behalf of such Underwriter specifically for use in the preparation thereof, and will reimburse the Company or the Selling Stockholder for any legal or other expenses reasonably incurred by the Company or the Selling Stockholder in connection with defending against any such loss, claim, damage, liability or action.

(d) Promptly after receipt by an indemnified party under subsection (a), (b) or (c) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the failure to notify the indemnifying party shall not relieve the indemnifying party from any liability that it may have to any indemnified party except to the extent such indemnifying party has been materially prejudiced by such failure. In case any such action shall be brought against any indemnified party, and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate in, and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party, and after notice from the indemnifying party to such indemnified party of the indemnifying party’s election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof; provided, however, that if (i) the indemnified party has reasonably concluded (based on advice of counsel) that there may be legal defenses available to it or other indemnified parties that are different from or in addition to those available to the indemnifying party, (ii) a conflict or potential conflict exists (based on advice of counsel to the indemnified party) between the indemnified party and the indemnifying party (in which case the indemnifying party will not have the right to direct the defense of such action on behalf of the indemnified party), or (iii) the indemnifying party has not in fact employed counsel reasonably satisfactory to the indemnified party to assume the defense of such action within a reasonable time after receiving notice of the commencement of the action, the indemnified party shall have the right to employ a single counsel to represent it in any claim in respect of which indemnity may be sought under subsection (a), (b) or (c) of this Section 8, in which event the reasonable fees and expenses of such separate counsel shall be borne by the indemnifying party or parties and reimbursed to the indemnified party as incurred.

(e) The indemnifying party under this Section 8 shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party against any loss, claim, damage, liability or expense by reason of such settlement or judgment. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement, compromise or consent to the entry of judgment in any pending or threatened action, suit or proceeding in respect of which any indemnified party is a party or could be named and indemnity was or would be sought hereunder by such indemnified party, unless such settlement, compromise or consent (a) includes an unconditional release of such indemnified party from all liability for claims that are the subject matter of such action, suit or proceeding and (b) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

(f) If the indemnification provided for in this Section 8 is unavailable or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a), (b) or (c) above, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholder on the one hand and the Underwriters on the other from the offering of the Shares or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company and the Selling Stockholder on the one hand and the Underwriters on the other in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholder on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Stockholder bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Final Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholder or the Underwriters and the parties’ relevant intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The Company, the Selling Stockholder and the Representative agree that it would not be just and equitable if contributions pursuant to this subsection (e) were to be determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in the first sentence of this subsection (e). The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending against any action or claim that is the subject of this subsection (e). Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount of the Underwriter’s commissions referenced in Section 5(a) actually received by such Underwriter pursuant to this Agreement. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

(g) The obligations of the Company and the Selling Stockholder under this Section 8 shall be in addition to any liability that the Company and the Selling Stockholder may otherwise have and the benefits of such obligations shall extend, upon the same terms and conditions, to each person, if any, who controls an Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act; and the obligations of each Underwriter under this Section 8 shall be in addition to any liability that such Underwriter may otherwise have and the benefits of such obligations shall extend, upon the same terms and conditions, to the Company, the Selling Stockholder and their respective officers, directors and each person who controls the Company or the Selling Stockholder within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act.

(h) For purposes of this Agreement, the Representative confirms, and the Company and the Selling Stockholder acknowledge, that there is no information concerning the Underwriters furnished in writing to the Company or the Selling Stockholder by the Representatives or any Underwriter specifically for preparation of or inclusion in the Registration Statement, the Time of Sale Disclosure Package or the Prospectus, other than the statements set forth in the last paragraph on the cover page of the Prospectus and the statements set forth in the “Underwriting” section of the Prospectus and Time of Sale Disclosure Package, only insofar as such statements relate to the amount of selling concession and re-allowance or to over-allotment and related activities that may be undertaken by the Underwriters.

(i) For purposes of this Agreement, the Selling Stockholder confirms, and the Company and the Representative acknowledge, that there is no information concerning the Selling Stockholder furnished in writing to the Company or the Representative by the Selling Stockholder specifically for preparation of or inclusion in the Registration Statement, the Time of Sale Disclosure Package or the Prospectus, other than the statements set forth in (i) the “Selling Stockholder” section of the Prospectus and the Time of Sale Disclosure Package (other than the first paragraph under the table) and (ii) the last sentence in the fifth paragraph in the “Underwriting” section of the Prospectus and the Time of Sale Disclosure Package.

9. Representations and Agreements to Survive Delivery. All representations, warranties, and agreements of the Company and the Selling Stockholder herein or in certificates delivered pursuant hereto, including but not limited to the agreements of the several Underwriters, the Selling Stockholder and the Company contained in Section 6(a)(viii) and Section 8 hereof, shall remain operative and in full force and effect regardless of any investigation made by or on behalf of the Underwriters or any controlling person thereof, or the Company and the Selling Stockholder or any of their respective officers, directors, or controlling persons, and shall survive delivery of, and payment for, the Shares to and by the Underwriters hereunder.

10. Termination of this Agreement. The Representative shall have the right to terminate this Agreement by giving notice to the Company and the Selling Stockholder as hereinafter specified at any time at or prior to the Closing Date, if in the discretion of the Representative, (i) there has occurred any material adverse change in the securities markets or any event, act or occurrence that has materially disrupted, or in the opinion of the Representative, will in the future materially disrupt, the securities markets or there shall be such a material adverse change in general financial, political or economic conditions or the effect of international conditions on the financial markets in the United States is such as to make it, in the judgment of the Representative, inadvisable or impracticable to market the Shares or enforce contracts for the sale of the Shares (ii) trading in the Common Stock shall have been suspended by the Commission, trading in securities generally on the Nasdaq Global Market, New York Stock Exchange or NYSE Amex shall have been suspended, or the quotation of the Common Stock shall have been terminated or suspended by the OTC, (iii) minimum or maximum prices for trading shall have been fixed, or maximum ranges for prices for securities shall have been required, on the Nasdaq Global Market, New York Stock Exchange or NYSE Amex, by such exchange or by order of the Commission or any other governmental authority having jurisdiction, (iv) a banking moratorium shall have been declared by federal or state authorities, (v) there shall have occurred any attack on, outbreak or escalation of hostilities or act of terrorism involving the United States, any declaration by the United States of a national emergency or war, any substantial change or development involving a prospective substantial change in United States or international political, financial or economic conditions or any other calamity or crisis, or (vi) the Company suffers any loss by strike, fire, flood, earthquake, accident

or other calamity, whether or not covered by insurance, or (vii) in the judgment of the Representative, there has been, since the time of execution of this Agreement or since the respective dates as of which information is given in the Prospectus, any material adverse change in the assets, properties, condition, financial or otherwise, or in the results of operations, business affairs or business prospects of the Company and its subsidiaries considered as a whole, whether or not arising in the ordinary course of business. Any such termination shall be without liability of any party to any other party except that the provisions of Section 6(a)(viii) and Section 8 hereof shall at all times be effective and shall survive such termination.

11. Notices. Except as otherwise provided herein, all communications hereunder shall be in writing and, if to Roth, shall be mailed, delivered or telecopied to Roth Capital Partners, LLC, 24 Corporate Plaza, Newport Beach, CA 92660, telecopy number: (949) 720-7227, Attention: Managing Director; if to the Selling Stockholder, shall be mailed, delivered or telecopied to I-Flow Corporation 20202 Windrow Drive, Lake Forest, CA 92630, telecopy number: (920) 969-4912, Attention: John R. Adams; and if to the Company, shall be mailed, delivered or telecopied to InfuSystem Holdings, Inc., 31700 Research Park Dr., Madison Heights, MI 48071, telecopy number: (248) 658-6469, Attention: Chief Executive Officer; or in each case to such other address as the person to be notified may have requested in writing. Any party to this Agreement may change such address for notices by sending to the parties to this Agreement written notice of a new address for such purpose.

12. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns and the controlling persons, officers and directors referred to in Section 8. Nothing in this Agreement is intended or shall be construed to give to any other person, firm or corporation any legal or equitable remedy or claim under or in respect of this Agreement or any provision herein contained. The term “successors and assigns” as herein used shall not include any purchaser, as such purchaser, of any of the Shares from an Underwriter.

13. Absence of Fiduciary Relationship. The Company and the Selling Stockholder acknowledge and agree that: (a) the Underwriters have been retained solely to act as underwriters in connection with the sale of the Shares and that no fiduciary, advisory or agency relationship between the Company and the Selling Stockholder and any Underwriter or the Representative has been created in respect of any of the transactions contemplated by this Agreement, irrespective of whether any Underwriter or the Representative has advised or is advising the Company or the Selling Stockholder on other matters; (b) the price and other terms of the Shares set forth in this Agreement were established by the Company and the Selling Stockholder following discussions and arms-length negotiations with the Underwriters and the Company and the Selling Stockholder are capable of evaluating and understanding and understands and accepts the terms, risks and conditions of the transactions contemplated by this Agreement; (c) they have been advised that the Representative, each Underwriter and their respective affiliates are engaged in a broad range of transactions that may involve interests that differ from those of the Company and the Selling Stockholder and that neither the Representative nor any Underwriter has any obligation to disclose such interest and transactions to the Company or the Selling Stockholder by virtue of any fiduciary, advisory or agency relationship; (d) they have been advised that the Representative and each Underwriter is acting, in respect of the transactions contemplated by this Agreement, solely for its own benefit, and not on behalf of the Company or the Selling Stockholder.

14. Amendments and Waivers. No supplement, modification or waiver of this Agreement shall be binding unless executed in writing by the party to be bound thereby. The failure of a party to exercise any right or remedy shall not be deemed or constitute a waiver of such right or remedy in the future. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provision hereof (regardless of whether similar), nor shall any such waiver be deemed or constitute a continuing waiver unless otherwise expressly provided.

15. Partial Unenforceability. The invalidity or unenforceability of any section, paragraph, clause or provision of this Agreement shall not affect the validity or enforceability of any other section, paragraph, clause or provision.

16. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York.

17. Submission to Jurisdiction. The Company and the Selling Stockholder irrevocably (a) submit to the jurisdiction of any court of the State of New York located in New York County and the United States District Court for the Southern District of New York for the purpose of any suit, action, or other proceeding arising out of this Agreement, or any of the agreements or transactions contemplated by this Agreement, the Registration Statement and the Prospectus (each a “Proceeding”), (b) agree that all claims in respect of any Proceeding may be heard and determined in any such court, (c) waive, to the fullest extent permitted by law, any immunity from jurisdiction of any such court or from any legal process therein, (d) agree not to commence any Proceeding other than in such courts, and (e) waive, to the fullest extent permitted by law, any claim that such Proceeding is brought in an inconvenient forum. EACH OF THE COMPANY (ON BEHALF OF ITSELF AND, TO THE FULLEST EXTENT PERMITTED BY LAW, ON BEHALF OF ITS RESPECTIVE EQUITY HOLDERS AND CREDITORS) AND THE SELLING STOCKHOLDER HEREBY WAIVE ANY RIGHT THEY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY CLAIM BASED UPON, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT AND THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, THE REGISTRATION STATEMENT, AND THE PROSPECTUS.

18. Counterparts. This Agreement may be executed and delivered (including by facsimile transmission and electronic mail attaching a portable document file (.pdf)) in one or more counterparts and, if executed and delivered in more than one counterpart, the executed counterparts shall each be deemed to be an original and all such counterparts shall together constitute one and the same instrument.

Please sign and return to the Company the enclosed duplicates of this letter whereupon this letter will become a binding agreement among the Company, the Selling Stockholder and the Underwriters in accordance with its terms.


Very truly yours,

INFUSYSTEM HOLDINGS, INC.

By:
Name:
Title:


Confirmed as of the date first above-mentioned by the Selling Stockholder.

I-FLOW CORPORATION

By:
Name:
Title:


Confirmed as of the date first above-mentioned.

ROTH CAPITAL PARTNERS, LLC, on behalf of itself and as Representative of the Several Underwriters

By:
Name:
Title:

SCHEDULE I

Underwriters


Underwriter		Shares
Roth Capital Partners, LLC		•
Maxim Group LLC		•
Total		2,789,203

Pricing Information

Number of Shares: 2,789,203

Public Offering Price: $• per Share

Underwriting Discount: $• per Share

Proceeds to Selling Stockholder (before expenses): $•

SCHEDULE II

[NONE]

SCHEDULE III

Company Opinions

1. The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, with the requisite corporate power to own or lease, as the case may be, and operate its properties, and to conduct its business, as described in the Registration Statement and the Final Prospectus.

2. The Company is duly registered or qualified to do business as a foreign corporation and is in good standing under the laws of the States of ______________.

3. The issuance of the Shares has been duly authorized and, when issued and paid for by you pursuant to the Agreement, the Shares will be validly issued, fully paid and nonassessable.

4. The holders of outstanding shares of capital stock of the Company Stock are not entitled to any preemptive right or right of first refusal (i) set forth in or provided for by the Company’s currently effective Certificate of Incorporation or By-Laws (collectively, the “Company Governing Documents”), or (ii) to our knowledge, granted by the Company in any currently effective written agreement.

5. The statements in the Base Prospectus, the most recent Prospectus that is part of the Time of Sale Disclosure Package (the “Time of Sale Prospectus”) and the Final Prospectus under the headings “Description of Common Stock” and “Underwriting” and in the Registration Statement in Part II, Item 14, insofar as such statements purport to summarize legal matters, agreements or documents discussed therein, fairly summarize such legal matters, agreements or documents, in all material respects.

6. The Registration Statement has become effective under the Securities Act. We have been orally advised by the Staff of the Commission that no stop order suspending the effectiveness of the Registration Statement has been issued, and to our knowledge, no proceedings for that purpose have been instituted or overtly threatened by the Commission. Any required filing of the Prospectus, and any required supplement thereto, pursuant to Rule 424(b) under the Securities Act, has been made in the manner and within the time period required by Rule 424(b).

7. The Agreement has been duly authorized by all necessary corporate action on the part of the Company and has been duly executed and delivered by the Company.

8. The Company is not, and after giving effect to the offering and sale of the Shares and the application of the proceeds thereof as described in the Time of Sale Disclosure Package and the Final Prospectus will not be, required to register as an “investment company” as defined in the Investment Company Act.

9. No consent, approval, authorization or filing with or order of any U.S. Federal, State of Delaware court or governmental agency or body having jurisdiction over the Company is required, under the laws, rules and regulations of the United States of America and the State of Delaware, for the consummation by the Company of the transactions contemplated by the Agreement, except (i) such as have been made or obtained under the Securities Act and (ii) such as may be required under the blue sky laws of any jurisdiction in connection with the purchase and distribution of the Shares by you in the manner contemplated in the Agreement and in the Final Prospectus, as to which we express no opinion.

10. The issue and sale of the Shares pursuant to the Agreement will not result in a breach or violation of (or constitute any event that with notice, lapse of time or both would result in a breach of violation of): (i) the Company Governing Documents, (ii) any statute, rule, or regulation of the United States of America or the State of Delaware which, in our experience, is typically applicable to transactions of the nature contemplated by the Agreement and is applicable to the Company, (iii) any currently effective order, writ, judgment, injunction, decree, or award that names and has been entered against the Company and of which we have knowledge, or (iv) any Contract that was filed as an exhibit to the Company’s most recent annual report on Form 10-K, in each case (ii) through (iv) the breach or violation of which would materially and adversely affect the Company.

In addition to rendering legal advice and assistance to the Company in the course of the preparation of the Registration Statement and the Time of Sale Disclosure Package and the Final Prospectus, involving, among other things, discussions and inquiries concerning various legal matters and the review of certain corporate records, documents and proceedings, we also participated in conferences with certain officers and other representatives of the Company, its independent certified public accountants and you and your counsel, at which the contents of the Registration Statement, the Time of Sale Disclosure Package and the Final Prospectus and related matters were discussed. We have also reviewed and relied upon certain corporate records and documents of the Company, letters from counsel and accountants, and oral and written statements and certificates of officers and other representatives of the Company and others as to the existence and consequences of certain factual and other matters.

The purpose of our professional engagement was not to establish or confirm factual matters or financial or quantitative information. Therefore, we are not passing upon and do not assume any responsibility for the accuracy, completeness or fairness of the statements or information contained in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus and have not made, or undertaken any obligation to make, an independent check or verification thereof. Moreover, many of the determinations required to be made in the preparation of the Registration Statement, the Time of Sale Disclosure Package and the Final Prospectus involve matters of a non-legal nature.

However, subject to the foregoing and based on our participation, review and reliance described in the second preceding paragraph, (i) we believe the Registration Statement (as of its effective date), the Time of Sale Prospectus (as of the Applicable Time), the Final Prospectus (as of its date), and any further amendments and supplements thereto (as of their respective dates), as applicable, made by the Company prior to the Closing Date (other than the financial statements and schedules and other financial and statistical data included therein or derived therefrom, as to

which we express no belief) appeared on their face to be appropriately responsive, and complied as to form, in all material respects to the requirements of the Securities Act and the applicable rules and regulations of the Commission thereunder, and (ii) we confirm that no facts have come to our attention that caused us to believe (a) that the Registration Statement or any amendment thereto filed by the Company prior to the Closing Date (other than the financial statements and schedules and other financial and statistical data included therein or derived therefrom, as to which we express no belief), when the Registration Statement or such amendment became effective, except as it relates to any class of securities other than the Common Stock, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading, (b) that the Time of Sale Disclosure Package (other than the financial statements and schedules and other financial and statistical data included therein or derived therefrom, as to which we express no belief), as of 6:00 a.m. PDT on __________, 2010 (the “Applicable Time,” which, you have informed us, is a time before the time of the first sale of the Shares by any Underwriter), except as it relates to any class of securities other than the Common Stock, contained any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; or (c) that, as of its date and as of the Closing Date, the Final Prospectus or any further amendment or supplement thereto made by the Company prior to the Closing Date (other than the financial statements and schedules and other financial and statistical data included therein or derived therefrom, as to which we express no belief), except as it relates to any class of securities other than the Common Stock, contained or contains any untrue statement of a material fact or omitted or omits to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading. We do not express any belief with respect to the assessments of or reports on the effectiveness of internal control over financial reporting contained in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus.

In addition, we supplementally inform you that, to our knowledge, there is no action, suit or proceeding by or before any court or other governmental agency, authority or body or any arbitrator pending or overtly threatened against the Company or its properties by a third party of a character required to be disclosed in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus that is not disclosed in the Registration Statement, the Time of Sale Disclosure Package or the Final Prospectus as required by the Securities Act and the rules thereunder.

SCHEDULE IV

Selling Stockholder Opinions

1. The Selling Stockholder is duly organized, validly existing and in good standing under the laws of the state of its organization with requisite power to own or lease, as the case may be, and to operate its properties and conduct its business.

2. The statements in any Prospectus under the headings “Selling Stockholder”, insofar as such statements purport to summarize legal matters, agreements or documents discussed therein, fairly present, to the extent required by the Securities Act and the rules thereunder, in all material respects, such legal matters, agreements or documents.

3. The Agreement has been duly authorized by all necessary action on the part of the Selling Stockholder and has been duly executed and delivered by the Selling Stockholder.

4. The sale of the Shares by the Selling Stockholder pursuant to the Agreement will not result in a breach or violation of (or constitute any event that with notice, lapse of time or both would result in a breach of violation of): (i) the charter or other organizational documents of the Selling Stockholder, (ii) any statute, law, rule, or regulation which, in our experience is typically applicable to transactions of the nature contemplated by the Agreement and is applicable to the Selling Stockholder, or any order, writ, judgment, injunction, decree, or award that has been entered against the Selling Stockholder and of which we are aware.

5. No consent, approval, authorization or filing with or order of any U.S. Federal or California court or governmental agency or body having jurisdiction over the Selling Stockholder is required for the consummation by the Selling Stockholder of the transactions contemplated by the Agreement, except such as have been obtained under the Securities Act and except such as may be required under the blue sky laws of any jurisdiction in connection with the purchase and distribution of the Shares by the Underwriter in the manner contemplated in the Agreement and in the Final Prospectus.

SCHEDULE V

Persons Subject to Lock-Up Agreements

Sean McDevitt

David Dreyer

James Freddo, M.D.

Timothy Kopra

Pat LaVecchia

Jean-Pierre Millon

John Voris

Wayne Yetter

Sean Whelan

SCHEDULE VI

Form of Lock-Up Agreement

_________, 2010

Roth Capital Partners, LLC,

As Representative of the Several Underwriters

24 Corporate Plaza

Newport Beach, California 92660

Ladies and Gentlemen:

The undersigned understands that you, as the representative (the “Representative”) of the several underwriters named therein (the “Underwriters”), propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with InfuSystem Holdings, Inc., a Delaware corporation (the “Company”), and I-Flow Corporation (the “Selling Stockholder”) providing for the public offering (the “Offering”) of shares of the Common Stock, par value $0.0001 per share (the “Common Stock”), of the Company owned by the Selling Stockholder.

In consideration of the foregoing, and in order to induce the Underwriters to participate in the Offering, and for other good and valuable consideration receipt of which is hereby acknowledged, the undersigned hereby agrees that, without the prior written consent of the Placement Agent (which consent may be withheld in its sole discretion), the undersigned will not, during the period (the “Lock-Up Period”) beginning on the date hereof and ending on the date 90 days after the date of the final prospectus (including the final prospectus supplement) to be used in confirming the sale of the Shares (the “Final Prospectus”), (1) offer, pledge, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, or file (or participate in the filing of) a registration statement with the Securities and Exchange Commission in respect of, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for shares of Common Stock (including without limitation, shares of Common Stock which may be deemed to be beneficially owned by the undersigned in accordance with the rules and regulations of the Securities and Exchange Commission and securities which may be issued upon exercise of a stock option or warrant), (2) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the shares of, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of shares of Common Stock or such other securities, in cash or otherwise, (3) make any demand for or exercise any right with respect to, the registration of any shares of Common Stock or any security convertible into or exercisable or exchangeable for shares of Common Stock, or (4) publicly announce an intention to effect any transaction specific in clause (1), (2) or (3) above.

Notwithstanding the foregoing, the restrictions set forth in clause (1) and (2) above shall not apply to (a) transfers (i) as a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, (ii) to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, (iii) with your prior written consent or (iv) effected pursuant to any exchange of “underwater” options with the Company, (b) the acquisition or exercise of any stock option

issued pursuant to the Company’s existing stock option plan, including any exercise effected by the delivery of shares of Common Stock of the Company held by the undersigned, or (c) the purchase or sale of the Company’s securities pursuant to a plan, contract or instruction that satisfies all of the requirements of Rule 10b5-1(c)(1)(i)(B) that was in effect prior to the date hereof. For purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin. None of the restrictions set forth in this Lock-Up Agreement shall apply to shares of Common Stock acquired in open market transactions.

For the purpose of allowing the Underwriters to comply with FINRA Rule 2711(f)(4), if (1) during the last 17 days of the Lock-Up Period, the Company releases earnings results or publicly announces other material news or a material event relating to the Company occurs or (2) prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the 16 day period beginning on the last day of the Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18 day period beginning on the date of release of the earnings results or the public announcement regarding the material news or the occurrence of the material event, as applicable, unless the Representative waives, in writing, such extension. The Company agrees not to accelerate the vesting of any option or warrant or the lapse of any repurchase right prior to the expiration of the Lock-Up Period. In furtherance of the foregoing, the Company, and any duly appointed transfer agent or depositary for the registration or transfer of the securities described herein, are hereby authorized to decline to make any transfer of securities if such transfer would constitute a violation or breach of this Lock-Up Agreement.

The foregoing restrictions are expressly agreed to preclude the undersigned from engaging in any hedging or other transaction which is designed to or reasonably expected to lead to or result in a sale or disposition of shares of Common Stock even if such securities would be disposed of by someone other than the undersigned. Such prohibited hedging or other transactions would include without limitation any short sale or any purchase, sale or grant of any right (including without limitation any put option or put equivalent position or call option or call equivalent position) with respect to any of the shares of Common Stock or with respect to any security that includes, relates to, or derives any significant part of its value from such shares.

The undersigned hereby represents and warrants that the undersigned has full power and authority to enter into this Lock-Up Agreement. All authority herein conferred or agreed to be conferred and any obligations of the undersigned shall be binding upon the successors, assigns, heirs or personal representatives of the undersigned.

The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar or depositary against the transfer of the undersigned’s shares of Common Stock except in compliance with the foregoing restrictions.

The undersigned understands that, if the Underwriting Agreement does not become effective, or if the Underwriting Agreement (other than the provisions thereof which survive termination) shall terminate or be terminated prior to payment for and delivery of the Shares to be sold thereunder, the undersigned shall be released from all obligations under this Lock-Up Agreement.

This Lock-Up Agreement shall be governed by and construed in accordance with the laws of the State of New York, without regard to the conflict of laws principles thereof.

Very truly yours,

Name: