Document:

GUARANTY

     

    I.  RECITALS

     

    Reference
      is made to those certain Promissory Notes dated as of May 15, 2006 collectively,
      (the “Notes”) in the aggregate principal amount of $2,350,000 (as such principal
      amount may be increased or decreased pursuant to the Merger Agreement dated
      as
      of May 15, 2006 by and among a21, Inc., a Texas corporation (the “Guarantor”),
      AE Acquisition Corp., a Delaware corporation and a wholly-owned subsidiary
      of
      the Guarantor, ArtSelect, Inc., a Delaware corporation (“Borrower”), the
      noteholders set forth on Exhibit
      A
      attached
      hereto (each, a “Lender” and collectively the “Lenders”), and Udi Toledano, as
      stockholder representative), made by Borrower in favor of the Lenders. Udi
      Toledano acts as administrative and collateral agent for Lenders under the
      terms
      of the Notes (in such capacity “Administrative Agent”). 

     

    As
      one of
      the conditions for accepting the Notes, the Lenders have required that the
      undersigned Guarantor guaranty the obligations of Borrower to the Lenders
      arising under the Notes as herein provided. 

     

    Guarantor
      is the sole shareholder of Borrower and will receive substantial direct and
      indirect benefit by reason of Lenders accepting the Notes, and Guarantor has
      determined that its execution, delivery and performance of this Guaranty are
      in
      the best interests of Guarantor.

     

    Capitalized
      terms used and not otherwise defined herein shall have the respective meanings
      provided for in the Notes.

     

    II.  GUARANTY

     

    Therefore,
      for value received, and in consideration of the financial accommodations under
      the Notes, Guarantor hereby unconditionally guaranties the full and prompt
      payment when due in accordance with the terms and conditions of the Notes,
      whether at maturity or earlier, by reason of acceleration or otherwise, and
      at
      all times thereafter, of all of obligations, liabilities and indebtedness of
      every kind, nature and description owing by the Borrower to Lenders or the
      Administrative Agent evidenced by or arising under the Notes, whether direct
      or
      indirect, absolute or contingent, joint or several, due or not due, primary
      or
      secondary, liquidated or unliquidated, including principal, interest, charges,
      fees, costs, indemnities and expenses, however evidenced, whether as principal,
      surety, endorser, guarantor or otherwise, whether now existing or hereafter
      arising, whether arising before, during or after the initial or any renewal
      term
      of the Notes, whether arising before, during or after the commencement of any
      insolvency proceeding with respect to the Borrower (and including the payment
      of
      interest, fees, costs, expenses and other amounts which would accrue and become
      due but for the commencement of such insolvency proceeding, whether or not
      such
      interest is allowed or allowable in whole or in part in any such insolvency
      proceeding) (collectively, the “Obligations”).

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    Guarantor
      hereby agrees that this Guaranty is a present and continuing guaranty of payment
      and not of collection and that its obligations hereunder shall be
      unconditional.

     

    Guarantor
      hereby agrees to pay any and all reasonable expenses (including reasonable
      attorney’s fees and expenses) which may be incurred by Lenders and/or the
      Administrative Agent in enforcing their rights under this Guaranty.

     

    Notwithstanding
      any provision of this Guaranty to the contrary, it is intended that this
      Guaranty, not constitute a “Fraudulent Conveyance” (as defined below).
      Consequently, Guarantor agrees that if this Guaranty, would, but for the
      application of this sentence, constitute a Fraudulent Conveyance, this Guaranty
      shall be valid and enforceable only to the maximum extent that would not cause
      this Guaranty to constitute a Fraudulent Conveyance, and this Guaranty shall
      automatically be deemed to have been amended accordingly at all relevant times.
      For purposes hereof, “Fraudulent Conveyance” means a fraudulent conveyance or
      fraudulent transfer under Section 548 of Chapter 11 of Title 11 of the United
      States Code (11 U.S.C. Section 101 et seq.), as amended or a fraudulent
      conveyance or fraudulent transfer under the provisions of any applicable
      fraudulent conveyance or fraudulent transfer law or similar law of any state,
      nation or other governmental unit, as in effect from time to time.

     

    No
      payment made by or for the account or benefit of Guarantor pursuant to this
      Guaranty shall entitle Guarantor, by subrogation or otherwise, to any payment
      by
      Borrower or from or out of any property of Borrower.

     

    Guarantor
      hereby waives diligence, presentment, demand of payment, filing of claims with
      a
      court in the event of any bankruptcy proceeding (or other insolvency proceeding)
      of Borrower, protest or notice with respect to the Obligations and all demands
      whatsoever, and covenants that this Guaranty will not be discharged, except
      by
      complete and irrevocable payment and performance of all the obligations and
      liabilities contained herein. No notice to Guarantor or any other party shall
      be
      required for Administrative Agent, on behalf of Administrative Agent or any
      Lender, to make demand hereunder. Upon the occurrence and during the continuance
      of any Event of Default, Administrative Agent may, at its sole election, proceed
      directly and at once, without notice, against any Guarantor to collect and
      recover the full amount or any portion of the Obligations, without first
      proceeding against Borrower, any other individual or entity or any security
      or
      collateral for the Obligations. Administrative Agent shall have the exclusive
      right to determine the application of payments and credits, if any, from
      Guarantor, Borrower, any other individual or entity, or any security or
      collateral for the Obligations, on account of the Obligations or of any other
      liability of Guarantor to Administrative Agent and Lenders arising
      hereunder.

     

    Guarantor
      hereby assumes responsibility for keeping itself informed of the financial
      condition of Borrower, and any and all endorsers and other guarantors of all
      or
      any part of the Obligations and of all other circumstances bearing upon the
      risk
      of nonpayment of the Obligations or any part thereof that diligent inquiry
      would
      reveal, and Guarantor hereby agrees that neither Administrative Agent nor any
      Lender shall have any duty to advise Guarantor of information known to such
      Administrative Agent or Lender regarding such condition or any such
      circumstances. Guarantor hereby acknowledges familiarity with Borrower’s
      financial condition and that it has not relied on any statements by
      Administrative Agent or any Lender in obtaining such information. In the event
      Administrative Agent or any Lender, in its reasonable discretion, undertakes
      at
      any time or from time to time to provide any such information to Guarantor,
      neither Administrative Agent nor any Lender shall be under any obligation (i)
      to
      undertake any investigation with respect thereto, (ii) to disclose any
      information which, pursuant to accepted or reasonable commercial finance
      practices, Administrative Agent or such Lender wishes to maintain confidential
      or (iii) to make any other or future disclosures of such information, or any
      other information, to such Guarantor.

    
      
        
        

      

      
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    Guarantor
      consents and agrees that neither Administrative Agent nor any Lender shall
      be
      under any obligation to marshal any assets in favor of Guarantor or against
      or
      in payment of any or all of the Obligations. Guarantor further agrees that,
      to
      the extent that Borrower makes a payment or payments to Administrative Agent
      or
      any Lender, or Administrative Agent or any Lender receives any proceeds of
      Collateral, which payment or payments or any part thereof are subsequently
      invalidated, declared to be fraudulent or preferential, set aside or required
      to
      be repaid to Borrower, its estate, trustee, receiver or any other party,
      including without limitation Guarantor, under any bankruptcy law, state or
      federal law, common law or equitable cause, then to the extent of such payment
      or repayment, the Obligations or the part thereof which has been paid, reduced
      or satisfied by such amount shall be reinstated and continued in full force
      and
      effect as of the date such initial payment, reduction or satisfaction occurred,
      and this Guaranty shall continue to be in existence and in full force and
      effect, irrespective of whether any evidence of indebtedness has been
      surrendered or cancelled.

     

    Guarantor
      also waives all presentments, demands for performance, notices of
      nonperformance, protests, notices of protest, notices of dishonor, and notices
      of acceptance of this Guaranty.

     

    Notwithstanding
      any provision of this Guaranty to the contrary, any payment made by Guarantor
      to
      Administrative Agent or any Lender in respect of this Guaranty prior to all
      of
      the Notes being released from escrow pursuant to the terms and conditions of
      that certain Escrow Agreement (as the same my be amended, restated, modified
      or
      supplemented from time to time, the (“Escrow Agreement”) dated as of the date
      hereof by and among Loeb & Loeb LLP, as escrow agent ("Escrow Agent"),
      Gurantor, AE Acquisition Corp., a Delaware corporation, Borrower and
      Administrative Agent, shall be made to Escrow Agent to be held by Escrow Agent
      in accordance with and subject to the terms and conditions of the Escrow
      Agreement.

     

    III.  MISCELLANEOUS

     

    Guarantor
      hereby represents and warrants to Administrative Agent and Lenders that (i)
      it
      is duly organized, validly existing and in good standing under the laws of
      the
      jurisdiction of its organization, (ii) the execution, delivery and performance
      by Guarantor of this Guaranty is within its powers, have been duly authorized
      by
      all necessary action pursuant to its charter and by-laws, require no further
      action by or in respect of, or filing with, any governmental body, agency or
      official and do not violate, conflict with or cause a breach or a default under
      any provision of applicable law or regulation, of its charter and by-laws or
      any
      agreement, judgment, injunction, order, decree or other instrument binding
      upon
      it and (iii) this Guaranty, constitutes a valid and binding agreement or
      instrument of Guarantor, enforceable against Guarantor in accordance with its
      respective terms, except as the enforceability thereof may be limited by
      bankruptcy, insolvency or other similar laws relating to the enforcement of
      creditors’ rights generally and by general equitable
      principles.

    
      
        
        

      

      
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    This
      Guaranty shall be binding upon Guarantor and its successors and assigns, except
      that Guarantor may not assign its obligations hereunder without the written
      consent of Administrative Agent. All notices, approvals, requests, demands
      and
      other communications hereunder shall be given in accordance with the notice
      provision of the Notes.

     

    THIS
      GUARANTY SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE
      WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS OF LAWS
      PRINCIPLES. GUARANTOR HEREBY CONSENTS TO THE JURISDICTION OF ANY STATE OR
      FEDERAL COURT LOCATED WITHIN THE COUNTY OF NEW YORK, STATE OF NEW YORK AND
      IRREVOCABLY AGREES THAT, SUBJECT TO AGENT’S ELECTION, ALL ACTIONS OR PROCEEDINGS
      ARISING OUT OF OR RELATING TO THIS GUARANTY SHALL BE LITIGATED IN SUCH COURTS.
      GUARANTOR EXPRESSLY SUBMITS AND CONSENTS TO THE JURISDICTION OF THE AFORESAID
      COURTS AND WAIVES ANY DEFENSE OF FORUM NON CONVENIENS.

     

    GUARANTOR
      AND ADMINISTRATIVE AGENT HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL
      BY
      JURY IN ANY LEGAL ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS
      GUARANTY OR THE TRANSACTIONS CONTEMPLATED HEREBY AND AGREES THAT ANY SUCH ACTION
      OR PROCEEDING SHALL BE TRIED BEFORE A COURT AND NOT BEFORE A
      JURY.

     

    This
      Guaranty may be signed in any number of counterparts, each of which shall be
      an
      original, with the same effect as if the signatures thereto and hereto were
      upon
      the same instrument.

    
      
        
        

      

      
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    IN
      WITNESS WHEREOF, this Guaranty has been duly executed by each Guarantor this
      15
      day of May, 2006.

     

    
      	 	GUARANTOR:
	 	 	 
	 	a21,
              INC.
	 
 	 
 	 
 
	 	By:  	 
	 	 	
              
 
	 	Its:	 
	 	
              
 

    

     

    
      	 	 	 
	 	UDI
              TOLEDANO, as Agent
	 
 	 
 	 
 
	 	By:  	 
	 	 	
              
 
	 	Its:	
            
	 	
              

            

    

     

    
      
        GUARANTY

        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    EXHIBIT
      A

     

    NOTEHOLDERSEXCHANGE
      AGREEMENT

    
       

      This
        Exchange Agreement (the “Agreement”),
        dated
        as of the 15th
        day of
        May, 2006, is made and entered into by and among a21, Inc., a Texas corporation
        (“a21”)
        and
        the persons signatory hereto, (collectively the “Shareholders”).

       

      WHEREAS,
        the
        Shareholders are the holders of 10,000 shares of Series A Preferred Stock,
        par
        value $0.001 per share (the “Preferred Stock”), of a21, which shares of
        Preferred Stock were issued to the Shareholders on May 15, 2006 (the
“Original
        Issue Date”)
        pursuant to the terms of that certain Merger Agreement by and among a21,
        the
        Shareholders and the other parties thereto dated as of May 15, 2006 (the
        “Merger
        Agreement”);
        and

       

      WHEREAS,
        a21 is
        authorized to issue one hundred million (100,000,000) shares of Common Stock
        par
        value $0.001 per share (“Common
        Stock”);
        and

       

      WHEREAS,
        pursuant to the terms of the Merger Agreement, the Shareholders are entitled
        to
        exchange their shares of Preferred Stock for shares of Common Stock, but
        a21
        does not have a sufficient number of authorized shares of Common Stock available
        to issue to the Shareholders upon exchange of the Preferred Stock.

       

      NOW,
        THEREFORE,
        in
        consideration of the covenants and agreements set forth herein and in the
        Merger
        Agreement, and for other good and valuable consideration, and sufficiency
        of
        which are hereby acknowledged and intending to be legally bound hereby the
        parties agree as follows:

       

      1.  Exchange
        Rights at Option of the Holder.
        At any
        time prior to the receipt of a Company Notice (as defined below) or the
        Redemption Date (as defined below), each share of Preferred Stock shall be
        exchangeable, at the option of the holder thereof, and without the payment
        of
        additional consideration by the holder thereof, for such number of shares
        of
        fully paid, non-assessable shares of Common Stock equal to (a) the Stated
        Value,
        as hereinafter defined, divided by (b) the greater of the Average Price and
        the
        Minimum Exchange Price, each as hereinafter defined. The rate at which shares
        of
        Preferred Stock may be exchanged for shares of Common Stock, shall be subject
        to
        adjustment as provided below. “Average
        Price”
        shall
        mean the average of the Closing Price of the Common Stock for the 20 Trading
        Day
        period ending one Trading Day prior to the date notice of the exchange is
        sent
        by a Shareholder to a21. "Closing
        Price"
        shall
        mean the closing price of the Common Stock on the principal national securities
        exchange (which for purposes of this definition shall include the Nasdaq
        Stock
        Market, Inc. and the OTC Bulletin Board) on which the shares of Common Stock
        are
        then traded, or if the shares of Common Stock are not traded on a principal
        national securities exchange, the mean of the bid and asked prices of a share
        of
        Common Stock in the over-the-counter market. “Minimum
        Exchange Price”
means
        $.75. “Stated
        Value”
shall
        mean $315.00. "Trading
        Day"
        shall
        mean any day on which the shares of Common Stock are traded on their principal
        trading market. Therefore, assuming that the Average Price on a given day
        was
        less than $0.75, and the Minimum Exchange Price was $.75 per share, each
        share
        of Series A Preferred Stock would, as of such date, be exchangeable into
        420
        shares of Common Stock. If at least two-thirds of the Preferred Stock issued
        in
        connection with the Merger Agreement has been converted into Common Stock,
        then
        all other shares of Preferred Stock shall be deemed to have been converted
        into
        Common Stock on the last date that the last of the Shareholders owning at
        least
        two-thirds of the Preferred Stock converted their Preferred
        Stock.

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

       

      2.  Exchange/Redemption
        Rights at Option of a21.

       

      (a)  At
        any
        time after the Authorization Date (as defined below), the then outstanding
        shares of Preferred Stock shall be exchangeable, at the option of a21, and
        without the payment of additional consideration by the holder thereof, for
        such
        number of fully paid non-assessable shares of Common Stock equal to the Stated
        Value divided by eighty-five percent (85%) of the Average Price at the time
        of
        notice by a21 to the Representative.

       

      (b)  At
        any
        time prior to exchange of the Preferred Shares into Common Stock, the then
        outstanding shares of Preferred Stock shall be redeemable at the option of
        a21,
        in exchange for an amount in cash equal to the Stated Value multiplied by
        the
        number of shares of Preferred Stock which are to be redeemed, plus five percent
        (5%) per annum on such redemption amount, compounded annually, computed from
        the
        Original Issue Date through and including the date the shares are
        redeemed.

       

      3.  Securities
        Law Representations.
        Each
        Shareholder by accepting the Preferred Stock represents that the Shareholder
        is
        acquiring the Preferred Stock for its own account or the account of an affiliate
        for investment purposes and not with the view to any offering or distribution
        and that the Shareholder will not sell or otherwise dispose of the Preferred
        Stock or the underlying Common Stock in violation of applicable securities
        laws.
        Each Shareholder acknowledges that the certificates representing any shares
        of
        Preferred Stock or Common Stock will bear a legend indicating that such
        securities have not been registered under the Securities Act of 1933, as
        amended
        (the “1933
        Act”)
        and
        may not be sold by such Shareholder except pursuant to an effective registration
        statement or pursuant to an exemption from the registration requirements
        of the
        1933 Act and in accordance with federal and state securities laws.

       

      4.  Authorized
        Shares of Common Stock.
        The
        Shareholders understand that the Company does not currently have a sufficient
        number of authorized shares of Common Stock available to issue upon exchange
        of
        the Preferred Stock. The Company hereby agrees to use commercially reasonable
        efforts to increase the number of its authorized shares of Common Stock to
        cover
        the number of shares of Common Stock that would be issuable upon exchange
        of the
        Preferred Stock. The date on which a21 increases its authorized shares of
        Common
        Stock to cover the number of shares of Common Stock that would be issuable
        upon
        exchange of the Preferred Stock is referred to in this Agreement as the
“Authorization
        Date”.
        The
        Company acknowledges that the Company will be obligated to pay damages to
        the
        Shareholders if the Authorization Date is later than July 30, 2006 pursuant
        to
        the terms of Section 8.5(b) of the Merger Agreement.

       

      5.  Fractional
        Shares.
        No
        fractional shares of Common Stock shall be issued upon exchange of the shares
        of
        Preferred Stock. In lieu of any fractional shares to which the holder would
        otherwise be entitled, a21 shall pay cash equal to such fraction multiplied
        by
        the then effective Closing Price of a share of Common Stock. 

      
        
          
          

        

        
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      6.  Mechanics
        of an Exchange/Redemption.
        

       

      (a)  In
        case
        of an exchange pursuant to Section 1, in order for a holder of shares of
        Preferred Stock to exchange shares of Preferred Stock for shares of Common
        Stock, such holder shall surrender the certificate or certificates for such
        shares of Preferred Stock at the principal office of a21, together with written
        notice (the “Exchange
        Notice”)
        to a21
        that such holder elects to exchange all or any number of the shares of Preferred
        Stock represented by such certificate or certificates. The Exchange Notice
        shall
        state such holder's name or the names of the nominees in which such holder
        wishes the certificate or certificates for shares of Common Stock to be issued.
        If required by a21, certificates surrendered for exchange shall be endorsed
        or
        accompanied by a written instrument or instruments of transfer, in form
        reasonably satisfactory to a21, duly executed by the registered holder or
        such
        holder’s attorney duly authorized in writing. The date of receipt of such
        certificates and the Exchange Notice by a21 shall be the exchange date (the
        "Exchange
        Date").
        

       

      i)  In
        the
        event that the Exchange Date is prior to the Authorization Date, such holder
        will not be entitled to receive the Common Stock issuable to such holder
        upon
        such exercise until the Authorization Date, provided that, as promptly as
        practicable after the Authorization Date, a21 shall deliver to such holder
        of
        Preferred Stock, or to such holder’s nominees, a certificate or certificates for
        the number of shares of Common Stock to which such holder would have been
        entitled as of the Exchange Date, together with cash in lieu for any fraction
        of
        a share.

       

      ii)  In
        the
        event that the Exchange Date is after the Authorization Date, a21 shall,
        as
        promptly as practicable after the Exchange Date, deliver to such holder of
        Preferred Stock, or to such holder’s nominees, a certificate or certificates for
        the number of shares of Common Stock to which such holder shall be entitled,
        together with cash in lieu for any fraction of a share. 

       

      (b)  In
        case
        of an exchange pursuant to Section 2(a), in order for a21 to cause the holders
        of shares of Preferred Stock to exchange their shares of Preferred Stock
        for
        shares of Common Stock, a21 shall deliver to each holder of Preferred Stock,
        at
        least ten days prior to the date the exchange is to take place, a written
        notice
        (the “Company
        Notice”)
        that
        a21 has elected to require such holder to exchange the outstanding shares
        of
        Preferred Stock into shares of Common Stock, together with its calculation
        of
        the number of shares of Common Stock that such holder is entitled to receive
        upon surrender of such holder’s shares of Preferred Stock. In order to receive
        certificates representing shares of Common Stock, such holder shall surrender
        the certificate or certificates for such shares of Preferred Stock at the
        principal office of a21, together with the name, if any, of any person other
        than the holder in which such holder wishes the certificate or certificates
        for
        shares of Common Stock to be issued. If required by a21, certificates
        surrendered for exchange shall be endorsed or accompanied by a written
        instrument or instruments of transfer, in form reasonably satisfactory to
        a21,
        duly executed by the registered holder or such holder’s attorney duly authorized
        in writing. For purposes of Section 2(a), the Exchange Date shall be the
        date of
        receipt by the holders of the shares of Preferred Stock of the Company Notice.
        a21 shall, as soon as practicable after the Exchange Date, deliver to such
        holder of Preferred Stock, or to such holder’s nominees, a certificate or
        certificates for the number of shares of Common Stock to which such holder
        shall
        be entitled, together with cash in lieu of any fraction of a share. On and
        after
        the Exchange Date, such holder or such holder’s nominees shall be deemed to be
        the record owner of such shares of Common Stock and have all the rights
        appertaining thereto.

      
        
          
          

        

        
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      (c)  In
        case
        of a redemption pursuant to Section 2(b), in order for a21 to cause the holders
        of shares of Preferred Stock to surrender their shares of Preferred Stock
        for
        cash, a21 shall deliver to each holder of shares of Preferred Stock, at least
        ten days prior to the date the redemption is to take place (the “Redemption
        Date”),
        a
        written notice (the “Redemption
        Notice”)
        that
        a21 has elected to require such holder to surrender outstanding shares of
        Preferred Stock for cash, together with its calculation of the amount of
        cash
        (the “Price”)
        that
        such holder is entitled to receive upon surrender of such holder’s shares of
        Preferred Stock. The Shareholders may exchange their shares of Preferred
        Stock
        in accordance with Section 1 up to the close of business on the business
        day
        immediately prior to the Redemption Date. In order to receive the Price,
        such
        holder shall surrender the certificate or certificates for such shares of
        Preferred stock at the principal office of a21. If required by a21, certificates
        surrendered shall be endorsed or accompanied by a written instrument or
        instruments of transfer, in form reasonably satisfactory to a21, duly executed
        by the registered holder or such holder’s attorney duly authorized in writing.
        a21 shall, as soon as practicable after receipt of the certificates for
        Preferred Stock, deliver to such holder of Preferred Stock a certified or
        bank
        check for the Price for such shares.

       

      (d)  All
        shares of Preferred Stock which shall have been surrendered or deemed to
        have
        been surrendered for exchange or redemption as herein provided shall be
        cancelled by a21 and shall no longer be deemed to be outstanding. All rights
        with respect to such cancelled shares, including the right, if any, to receive
        notices and to vote, shall immediately cease and terminate on the Exchange
        Date,
        except only the right of the holders thereof to receive certificates
        representing shares of Common Stock and cash in lieu of fractional shares
        in
        exchange therefor or the Price in cash as the case may be.

       

      7.  Reservation
        of Shares.
        a21
        shall at all times after the Authorization Date when shares of Preferred
        Stock
        are outstanding, reserve for the purpose of effecting the exchange of the
        shares
        of Preferred Stock, such number of its shares of Common Stock as shall from
        time
        to time be sufficient to effect the exchange of all outstanding shares of
        Preferred Stock.

       

      8.  Adjustments
        to Exchange Price.

       

      (a)  Adjustment
        for Stock Splits and Combinations.
        If a21
        shall at any time or from time to time after the Original Issue Date effect
        a
        subdivision of the outstanding shares of Common Stock, the Minimum Exchange
        Price in effect immediately before that subdivision shall be proportionately
        decreased. If a21 shall at any time or from time to time after the Original
        Issue Date combine the outstanding shares of Common Stock, the Minimum Exchange
        Price in effect immediately before the combination shall be proportionately
        increased. Any adjustment under this Section 8(a) shall become effective
        at the
        close of business on the date the subdivision or combination becomes effective.
        

       

      (b)  Adjustment
        for Certain Dividends and Distributions.
        In the
        event a21 at any time, or from time to time after the Original Issue Date
        shall
        make or issue, or fix a record date for the determination of holders of shares
        of Common Stock entitled to receive, a dividend or other distribution payable
        in
        additional shares of Common Stock, then and in each such event the Minimum
        Exchange Price shall be decreased as of the time of such issuance or, in
        the
        event such a record date shall have been fixed, as of the close of business
        on
        such record date, by multiplying the Minimum Exchange Price by a fraction:
        

      
        
          
          

        

        
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      (x)
        the
        numerator of which shall be the total number of shares of Common Stock issued
        and outstanding immediately prior to the close of business on such record
        date
        (or, if there is no record date, immediately prior to the time of such
        issuance); and 

       

      (y)
        the
        denominator of which shall be the total number of shares of Common Stock
        issued
        and outstanding immediately prior to the close of business on such record
        date
        (or, of there is no record date, immediately prior to the time of such issuance)
        plus the number of shares of Common Stock issuable in payment of such dividend
        or distribution; 

       

      provided,
        however, that if such record date shall have been fixed and such dividend
        is not
        fully paid or if such distribution is not fully made on the date fixed therefor,
        the Minimum Exchange Price shall be recomputed as of the close of business
        on
        such record date. 

       

      (c)  Adjustments
        for Stock Splits, Reverse Stock Splits, Other Dividends and
        Distributions.
        In the
        event a21 at any time after the Original Issue Date shall make or issue,
        or fix
        a record date for the determination of holders of Common Stock entitled to
        receive a dividend or other distribution payable in securities of a21 other
        than
        shares of Common Stock, or shall subdivide its outstanding Common Stock or
        combine its outstanding Common Stock into a smaller number of shares of Common
        Stock, then and in each such event a21 shall make provision so that the holders
        of the shares of Preferred Stock shall receive upon exchange thereof in addition
        to the number of shares of Common Stock receivable thereupon, the amount
        of
        securities of a21 that they would have received had the shares of Preferred
        Stock been exchanged for shares of Common Stock immediately prior to the
        date of
        such event and had they thereafter, during the period from the date of such
        event to and including the Exchange Date, retained such securities receivable
        by
        them as aforesaid during such period, giving application to all adjustments
        called for during such period under this Section 8(c) with respect to the
        rights
        of the holders of shares of Preferred Stock. 

       

      (d)  Adjustment
        for Reclassification, Exchange or Substitution.
        If the
        shares of Common Stock issuable upon the exchange of the shares of Preferred
        Stock shall be changed into the same or a different number of shares of any
        class or classes of stock, whether by capital reorganization, reclassification,
        or otherwise (other than a subdivision or combination of shares or stock
        dividend provided for above, or a reorganization, merger, consolidation,
        or sale
        of assets provided for below), then and in each such event the holder of
        each
        such share of Preferred Stock shall have the right thereafter to exchange
        such
        share into the kind and amount of shares of stock and other securities and
        property receivable upon such reorganization, reclassification, or other
        change,
        by holders of the number of shares of Common Stock for which such shares
        of
        Preferred Stock might have been exchanged immediately prior to such
        reorganization, reclassification, or change, all subject to further adjustment
        as provided herein. 

      
        
          
          

        

        
          5

          
            

          

        

        
          
          

        

      

       

      (e)  Adjustment
        for Merger, Consolidation or Sale of Assets.
        In case
        of any merger or consolidation of a21 with or into another corporation, or
        the
        sale of all or substantially all the assets of a21 to another person, each
        share
        of Preferred Stock shall be exchangeable (or shall be exchanged for a security
        which shall be exchangeable) for the kind and amount of shares of stock or
        other
        securities or property to which a holder of the number of shares of Common
        Stock
        deliverable upon exchange of such shares of Preferred Stock would have been
        entitled upon such merger, consolidation or sale of all or substantially
        all the
        assets of a21. 

       

      (f)  Anti
        Dilution for Additional Issuances.
        If a21
        issues any additional shares of Common Stock, or warrants or other securities
        convertible, exercisable or exchangeable for Common Stock, at a purchase,
        conversion, exercise or exchange price, as the case may be, less than the
        Minimum Exchange Price, the Minimum Exchange Price shall be adjusted to equal
        the price determined by multiplying the Minimum Exchange Price by a fraction,
        the denominator of which shall be the fully diluted number of shares of Common
        Stock outstanding immediately after giving effect to such transaction, and
        the
        numerator of which shall be the fully diluted number of shares of Common
        Stock
        that would have been outstanding immediately after such transaction if the
        purchase, conversion, exercise or exchange price, as the case may be, were
        the
        Minimum Exchange Price. For the purposes hereof, additional shares of Common
        Stock shall not include shares of Common Stock or warrants or other securities
        exercisable, convertible or exchangeable into Common Stock (i) issued to
        officers, directors, employees of and consultants to the Company and/or its
        subsidiaries pursuant to stock option, stock purchase or similar plans, (ii)
        shares of Common Stock issued in connection with any event for which adjustment
        is required to be made pursuant to another provision of this Agreement, or
        (iii)
        shares of Common Stock issued in connection with securities issued and
        outstanding prior to the consummation of the transactions contemplated by
        the
        Merger Agreement. Notwithstanding any other provision contained herein, in
        no
        event may the Minimum Exchange Price be reduced to below 80% of Minimum Exchange
        Price (after taking account any adjustments to the Minimum Exchange Price
        pursuant to Sections 8(a)-(e)) pursuant to the provisions of this Section
        8(f).

       

      (g)  No
        Impairment.
        Without
        limiting the foregoing, a21 shall use its best efforts to carry out all the
        provisions of this Section 8 and to take all such action as may be necessary
        or
        appropriate in order to protect against impairment the rights of the holders
        of
        shares of Preferred Stock to exchange their shares in accordance
        herewith.

       

      9.  Other
        Notices.
        In case
        at any time:

       

      (a)  a21
        shall
        declare any dividend upon Common Stock payable in cash or stock or make any
        other distribution to the holders of Common Stock;

       

      (b)  a21
        shall
        offer for subscription pro rata to the holders of Common Stock any additional
        shares of stock of any class or other rights;

       

      (c)  there
        shall be any capital reorganization or reclassification of the capital stock
        of
        a21, or a consolidation or merger of a21 with or into another entity or
        entities, or a sale, lease, abandonment, transfer or other disposition of
        all or
        substantially all its assets; or

      
        
          
          

        

        
          6

          
            

          

        

        
          
          

        

      

       

      (d)  there
        shall be a voluntary or involuntary dissolution, liquidation or winding up
        of
        a21;

       

      then,
        in
        any one or more of said cases, a21 shall give, by delivery in person, certified
        or registered mail, return receipt requested, telecopier or telex, addressed
        to
        each holder of any shares of Preferred Stock at the address of such holder
        as
        shown on the books of a21, (a) at least 20 days’ prior written notice of the
        date on which the books of a21 shall close or a record shall be taken for
        such
        dividend, distribution or subscription rights or for determining rights to
        vote
        in respect of any such reorganization, reclassification, consolidation, merger,
        disposition, dissolution, liquidation or winding up and (b) in the case of
        any
        such reorganization, reclassification, consolidation, merger, disposition,
        dissolution, liquidation or winding up, at least 20 days’ prior written notice
        of the date when the same shall take place. Such notice in accordance with
        the
        foregoing clause (a) shall also specify, in the case of any such dividend,
        distribution or subscription rights, the date on which the holders of Common
        Stock shall be entitled thereto and such notice in accordance with the foregoing
        clause (b) shall also specify the date on which the holders of Common Stock
        shall be entitled to exchange their Common Stock for securities or other
        property deliverable upon such reorganization, reclassification, consolidation,
        merger, disposition, dissolution, liquidation or winding up, as the case
        may
        be.

       

      10.  Lock-up.
        

       

      (a)  If
        any
        shares of Preferred Stock are exchanged by the holder of Preferred Stock
        pursuant to Section 1 and the shares of Common Stock issued upon exchange
        of the
        Preferred Stock are legally salable or transferable by the holder thereof
        at any
        time after the issuance of the shares of Common Stock, then:

       

      i)  1/3
        of
        the shares of Common Stock issued upon such exchange may be sold or otherwise
        transferred by the holder of the shares of Common Stock at any time after
        exchange;

       

      ii)  1/3
        of
        the shares of Common Stock issued upon such exchange may be sold or otherwise
        transferred by the holder of the shares of Common Stock at any time after
        the
        nine month anniversary of the date the exchange; and

       

      iii)  any
        remaining the shares of Common Stock issued upon such exercise may be sold
        or
        otherwise transferred by the holder of the shares of the shares of Common
        Stock
        at any time after the fifteen month anniversary of the date of the
        exchange.

       

      (b)  If
        any
        shares of Preferred Stock are exchanged by a21 pursuant to Section 2(a) and
        the
        shares of Common Stock issued upon exchange of the Preferred Stock are legally
        salable or transferable by the holder thereof at any time after the issuance
        of
        the shares of Common Stock, then:

       

      i)  1/3
        of
        the shares of Common Stock issued upon such exchange may be sold or otherwise
        transferred by the holder of the shares of Common Stock at any time after
        exchange;

      
        
          
          

        

        
          7

          
            

          

        

        
          
          

        

      

       

      ii)  1/3
        of
        the shares of Common Stock issued upon such exchange may be sold or otherwise
        transferred by the holder of the shares of Common Stock at any time after
        the
        three month anniversary of the date the exchange; and

       

      iii)  any
        remaining the shares of Common Stock issued upon such exercise may be sold
        or
        otherwise transferred by the holder of the shares of the shares of Common
        Stock
        at any time after the six month anniversary of the date of the
        exchange.

       

      11.  Amendments.
        This
        Agreement shall not be modified, amended or terminated without the written
        consent of all of the parties hereto.

       

      12.  Further
        Assurances.
        Each of
        the parties hereto shall use its commercially reasonable efforts to do all
        things necessary and advisable to make effective the transaction contemplated
        hereby and shall cooperate and take such action as may be reasonably requested
        by the other party in order in carry out fully the provisions and purposes
        of
        this Agreement and the transactions contemplated thereby.

       

      13.  Counterparts.
        This
        Agreement may be executed in one or more counterparts (including by facsimile)
        each of which shall be deemed to be an original, or which together shall
        constitute one in the same instrument.

       

      14.  Governing
        Law; Venue.
        This
        Agreement shall be governed by and construed in accordance with the laws
        of the
        State of New York, without regard to principles of conflicts of law. Each
        party
        agrees that it will bring any action or proceeding in respect to any claim
        arising out of or related to this Agreement or the transaction whether in
        tort
        or contract or at law and equity, exclusively in the U.S. District Court for the
        Southern District of New York (the “Chosen Courts”). In connection with such
        claims arising out of or related to this Agreement or the transaction, each
        party irrevocably submits to the exclusive jurisdiction of the Chosen Courts,
        waives any objection to laying venue in any such action or proceeding in
        the
        Chosen Courts, waives any objection that the Chosen Courts are on inconvenient
        forum or do not have jurisdiction over any of the parties, agrees that service
        of process in person or by certified or registered mail to its address will
        constitute valid in person or service upon such party and its successors
        and
        assigns in any action or proceeding with respect to any matter as to which
        it
        has submitted to jurisdiction hereunder.

       

      15.  Registration
        Rights.
        The
        Company acknowledges that the Shareholders have “piggy-back” registration rights
        pursuant to the terms of Sections 8.6 and 8.7 of the Merger Agreement.

       

      16.  Taxes.
        The
        Company will pay, when due and payable, any and all federal and state stamp,
        original issue or similar taxes which may be payable in respect of the
        issue of any shares of Common Stock upon exchange of the Preferred
        Stock.

       

      [The
        balance of this page is intentionally left blank.]

      
        
          
          

        

        
          8

          
            

          

        

        
          
          

        

      

       

      IN
        WITNESS WHEREOF, this Exchange Agreement has been executed as of the day
        and
        year first above written.

       

      
        	 	 	 
	 	a21,
                Inc.
	 	 
	 	 
	 
 	By:	 
 
	 	Title 	 
	 	 
	 	 

      

       

      
        	 	 Stockholder: 
	 	 
	  	 If
                an entity:	 

      

       

      
        	 	Name:	 

      

       

       

      
        	 	 	 
	 	
                 By:  

              	 
	 	
                
Name:
	 	Title 

      

       

      
        
          	 	 
	  	If
                  an
                  individual:	 
	 	 	 
	 	Name:	 

        

          

      

       

      
        
          
          

        

        
          9

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