Document:

Exhibit 10.51 11.21.2006

    Exhibit
      10.51

    

    October
      20, 2006

    

    Mr.
      William H. Mitchell

    17
      Rope
      Ferry Road

    Hanover,
      NH 03755

     

    

    Dear
      Bill:

     

    It
      is
      with tremendous pleasure that we extend an offer to you to join Audible Inc.
      We
      look forward to having you join our senior leadership team. The specifics of
      our
      offer are as follows: 

    

    Function: Chief
      Financial Officer

    

    Starting
      Date: As
      soon
      as possible, but no later than November 20, 2006 

    

    Compensation: $270,000/annum
      

     

    Bonus: You
      are
      eligible to receive up to 50% of your base pay as an annual bonus. For the
      balance of 2006 and for the first three quarters of 2007, payable on a pro
      rata
      quarterly basis, $80,000 of the target bonus will be guaranteed. The guarantee
      will be paid no later than six weeks after the close of the relevant quarter.
      The rest of your bonus within this time frame and beyond these dates will be
      based on meeting mutually agreed upon individual and the Company’s overall
      performance objectives.

     

    Long
      Term Compensation: Upon
      your
      commencement of employment, you will be granted 75,000 Audible restricted stock
      units or restricted stock under Audible’s Stock Incentive Plan. The specific
      grant will be formally readdressed by the Audible Board of Directors
      Compensation Committee at the end of your third year of employment. Our
      Compensation Committee will also review C level compensation each year, at
      which
      time additional incentives can be considered.

     

    Stock
      Vesting Schedule:
      Your
      restricted stock units/restricted stock shall vest in accordance with the
      following schedule: 33.3% of the units will vest at the end of Year 1, 33.3%
      of
      the shares shall vest at the end of Year 2, and 33.4% of the shares shall
      vest at the end of Year 3. The Company will, upon your request, on each vesting
      date of your initial restricted stock/unit award, withhold or redeem from you
      vested shares sufficient in amount to satisfy your tax liabilities that arise
      from such vesting, up to the statutory minimum withholding amount required
      by
      law.

    

    Accelerated
      Vesting:
      Our
      restricted stock agreements provides for automatic vesting of 50% of unvested
      shares in the event of a sale or merger of the company resulting in a qualified
      “change of ownership” prior to full vesting. It also provides that, at the time
      of the transaction, additional accelerated vesting can be approved by the
      Board.

     

    Representation: You
      represent that you are free to accept employment with Audible Inc. without
      any
      contractual restrictions, express or implied, with respect to any of your prior
      employers.

    

    Compliance: You
      agree
      to comply fully with all Audible policies and procedures, including but not
      limited to, any memoranda and communications pertaining to Audible’s policies,
      procedures, rules and regulations. 

    

    Non-Disclosure
      Agreement:
      All
      employees are required to execute a non-compete and non-disclosure agreement,
      a
      standard aspect of our hiring practices.

    

    Company
      Apartment: The
      Company will provide an apartment for you to use when you are working at Audible
      headquarters. The location, character and monthly cost of the dwelling will
      be
      subject to mutual agreement.

    

    Benefits: As
      of
      your first day as an employee, you (and your eligible dependents, if any) may
      be
      covered under Audible’s health insurance and dental plans, subject to its
      exclusions and limitations. The company will cover two thirds of your
      premium.

    

    The
      company will also pay 25% of your annual membership at a health club of your
      choice, reasonably approved by the company. The company also has a 401(k) plan,
      with a matching contribution of up to 2%, as well as Long Term Disability,
      FSA
      and Life Insurance Plans.

    

    Time
      Off: Twenty-five
      (25) days of vacation per annum prorated the first calendar year. The company
      typically observes seven holidays each year.

    

    Severance: You
      will
      be granted twelve months salary and benefits continuation in the event of
      termination without cause.

    

    In
      compliance with the Immigration Reform and Control Act of 1986, each new
      employee, as a condition of employment, must complete Employment Verification
      Form I-9 and present proof of identity and employment eligibility. Please bring
      the necessary documentation on your first day of work.

    

    You
      signature below indicates acceptance of these terms. Please note that this
      offer
      will expire at 5:00 pm on October 27, 2006.

    Bill,
      I
      hope you realize how very much I - and other people who have met you at Audible
      - look forward to having you as part of the Audible team.

    

    

    Regards,

    

    /s/
      Donald R. Katz

    

    Donald
      Katz

    Chairman
      and CEO

    Audible,
      Inc 

     

    

     
      Accepted: /s/
      William H. Mitchell                                                 Date:
      October
      27, 2006

     

    William
      H. Mitchell================================================================================

                           AMENDED LOCK DOWN AGREEMENT

         THIS AMENDED LOCK DOWN AGREEMENT (the "Agreement") is entered into as
of the 30th day of October, 2006, by and between CirTran Corporation (the
"Company") and Cornell Capital Partners, LP ("Cornell"). The Company and Cornell
may each be referred to herein as a "Party" and collectively as the "Parties."

                                    RECITALS

         A.       In December 2005, the Company and Cornell entered into a
transaction (the "Transaction") whereby the Company issued to Cornell a
convertible debenture (the "Cornell Debenture") in the principal amount of
$1,500,000.

         B.       In connection with the Transaction, the Company also issued to
Cornell warrants to purchase up to 10,000,000 shares of the Company's common
stock (the "Warrants"). The Warrants have an exercise price of $0.09 per share.

         C.       The Company and Cornell desire to enter into an agreement
whereby Cornell agrees that it will not convert or exercise any of the Cornell
Debenture or Warrants in excess of the Company's authorized but unissued shares
of the Company's common stock (the "Authorized But Unissued Share Amount") of
the Cornell Debenture until the Company has taken all steps necessary to
increase its authorized capital.

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the premises and the mutual
promises and undertakings set forth herein, and intending to be legally bound
hereby, the Parties agree as follows:

1.       Lock Down/ No Conversion or Exercise.

         A.       Cornell Debenture. Pursuant to this Agreement, Cornell hereby
                  agrees that it will not convert in excess of the Authorized
                  But Unissued Share Amount on the Cornell Debenture until the
                  Company has increased its authorized capital stock.

         B.       Warrants. Pursuant to this Agreement, Cornell hereby agrees
                  that it will not exercise in excess of the Authorized But
                  Unissued Share Amount of the Warrants until the Company has
                  increased its authorized capital stock.

2.       Company Obligations. In connection with this Agreement, the Company
hereby agrees:

<PAGE>

         A.       Not later than December 31, 2006 the Company will file with
                  the SEC a proxy statement, information statement, or such
                  other form as is appropriate, to effectuate an amendment to
                  the Company's articles of incorporation to increase the
                  Company's authorized capital stock. The Company also agrees to
                  use its best efforts to respond to any comments issued by the
                  SEC and to effectuate the amendment of the Company's articles
                  of incorporation to increase its authorized capital from
                  750,000,000 shares to 1,500,000,000 shares or such other
                  number as the Company deems appropriate.

         B.       The Company agrees to notify Cornell upon the filing of the
                  proxy statement, information statement, or such other form as
                  is appropriate, with the SEC, and upon the effective date of
                  the amendment of the Company's articles of incorporation.

         C.       The Parties hereby acknowledge and agree that in the event
                  that the Company has not effectuated the increase in its
                  authorized capital to 1,500,000,000 shares of common stock by
                  December 31, 2006 (the "Deadline"), such failure shall
                  constitute an "Event of Default" under the Cornell Debenture
                  and related documents and agreements.

3.       Termination. The Parties hereby acknowledge and agree that this
Agreement shall terminate upon the effectiveness of the increase in the
Company's authorized capital as described herein. Notwithstanding the foregoing,
in the event the Company has not effectuated the increase in authorized shares
of common stock by the Deadline, this Agreement shall terminate and all parties
shall have no obligations under this Agreement. The Parties further agree that
upon the termination of this Agreement, Cornell shall have no obligation to
exercise the Warrants or convert any amount of the Cornell Debenture, but shall
have any and all rights as delineated in the transaction documents relating to
the Warrants and the Cornell Debenture, as appropriate.

DATED as of October 30, 2006.

CIRTRAN CORPORATION                 CORNELL CAPITAL PARTNERS LP

By: /s/ Iehab Hawatmeh              By: Yorkville Advisors, LLC
   ----------------------------         -----------------------
Name: Iehab Hawatmeh                Its: General Partner
Title: President & CEO
                                    By: /s/ Mark A. Angelo
                                       -----------------------------------
                                    Name: Mark A. Angelo
                                         ---------------------------------
                                    Title: Portfolio Manager
                                          --------------------------------

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