EXHIBIT 10.4

                            FOURTH AMENDMENT TO LEASE

This Fourth Amendment to Lease ("Fourth  Amendment") is entered into as of March
24, 2005 by and between Mobile Park  Investment,  Inc.  ("Lessor") and Interlink
Electronics,  Inc.  ("Lessee") and amends that certain Lease Agreement-NNN dated
August 12, 1998, First Amendment to Lease dated July 23, 2003,  Second Amendment
to Lease dated January 23, 2004, and Third  Amendment to Lease dated October 14,
2004, for the Premises commonly known as 546 Flynn Road, Camarillo,  California,
("Premises"), as more particularly described therein.

Lessee  wishes to lease  additional  space and to extend  the term of the Lease.
Accordingly, the parties agree to amend the Lease as follows:

1.   PREMISES:                      Approximately  8,777  square  feet  at  3601
                                    Calle  Tecate will be added to the  Existing
                                    Premises  of  approximately   35,333  square
                                    feet,   for  a   total   New   Premises   of
                                    approximately   44,110   square  feet.   See
                                    attached Exhibit.

2    EFFECTIVE DATE:                March 1, 2005.

3.   NEW LEASE TERM:                Five (5) years  commencing March 1, 2005 and
                                    terminating on February 28, 2010.

4.   BASIC MONTHLY RENT:            As of the Effective  Date, the Basic Monthly
                                    Rent   for   the   New   Premises   will  be
                                    $29,112.60, NNN ($.66/s.f.).

5.   RENT ABATEMENT:                Basic   Monthly   Rent  for  the   Expansion
                                    Premises  ($5,792.82) will be abated for the
                                    period from March 1, 2005  through  July 31,
                                    2005.  Monthly  Rent  for the  New  Premises
                                    shall be due and  payable  on August 1, 2005
                                    and upon  payment  of the  monthly  rent and
                                    operating  expenses   reimbursement,   there
                                    shall be no additional  payment(s)  required
                                    by  Lessee  under  the  Lease  for the  Term
                                    preceding August 1, 2005.

6.   ESCALATIONS TO BASIC  MONTHLY  There will  be a fixed  three  percent  (3%)
     RENT:                          annual   increase   to  the   monthly   rent
                                    effective  March 1,  2006;  March  1,  2007;
                                    March 1, 2008 and March 1,  2009;  such that
                                    the  monthly  rent  payable  during the year
                                    starting at each  effective  date will be 3%
                                    higher than the monthly rent payable  during
                                    the year prior to each effective date.

7.   BUILDING SQUARE FOOTAGE:       Approximately 109,901 square feet.

8.   LESSEE'S SHARE OF BUILDING     40.14%
     OPERATING EXPENSES
     (NNN COSTS):


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9.   LEASE  CANCELLATION:           Lessee shall have a one-time right to cancel
                                    this  Lease  effective  at  the  end  of the
                                    thirty-sixth  (36th) month of the Lease Term
                                    with the following conditions:

                                    a)       Lessee  shall  provide at least six
                                             (6) months prior written  notice to
                                             Lessor  of its  election  to cancel
                                             the Lease;

                                    b)       Lessee  shall pay to Lessor,  prior
                                             to the cancellation date, an amount
                                             equal  to the  unamortized  cost of
                                             Tenant  Improvements  and brokerage
                                             commissions.

10.  TENANT IMPROVEMENTS:           Lessor, at its sole cost and expense,  shall
                                    provide the following:

                                    o        Complete      re-carpeting      and
                                             remodeling of Existing Premises per
                                             mutually   approved   plans   using
                                             building     standard     materials
                                             quantities, and specifications.  In
                                             no   event   will   the   costs  of
                                             re-carpeting and remodeling  exceed
                                             the  original  cost  allocation  of
                                             Lessor  under the Second  Amendment
                                             to Lease;

                                    o        All   plumbing,    electrical   and
                                             mechanical   systems  shall  be  in
                                             proper  working  order and  utility
                                             metering   will  be   modified   as
                                             required    for    the    Expansion
                                             Premises.

11.  UNRESERVED PARKING SPACES:     121 of which 12 spaces near the  entrance at
                                    the SE corner of the building will be marked
                                    for Interlink Electronics parking only.

12.  MONUMENT SIGNAGE:              Lessor  shall   coordinate  with  Lessee  to
                                    design,   plan   and   obtain   governmental
                                    approvals  as required for a single panel or
                                    multiple  panel  monument  type  sign  to be
                                    located  near the  corner of Flynn  Road and
                                    Calle Tecate  adjacent to the Building.  The
                                    costs   of  the   sign,   its   fabrication,
                                    installation,  and maintenance  shall be the
                                    responsibility  of Lessee if a single  panel
                                    (Interlink  Electronics)  monument  sign  is
                                    utilized,  or shall be shared by Lessee  and
                                    Lessor on a 50/50 basis if a multiple  panel
                                    monument  sign  is  utilized.  The  monument
                                    sign, its location, size, shape, and colors,
                                    shall be approved by Lessor,  which approval
                                    shall not be unreasonably  withheld,  and by
                                    the City of Camarillo, as required.

13.  OPTION TO EXTEND:              (See  attached   A.I.R.   Option  to  Extend
                                    Standard Lease Addendum).


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14.  FORCE AND  EFFECT:             To the extent  that any terms or  provisions
                                    of this Amendment are inconsistent  with any
                                    terms or  provisions  of the  Lease or prior
                                    Amendments, the terms and provisions of this
                                    Amendment  shall prevail and control for all
                                    purposes.

LESSOR:                                    LESSEE:
MOBILE PARK INVESTMENT, INC.               INTERLINK ELECTRONICS, INC.

By: /s/ Jim Cheston                        By: /s/ Paul D. Meyer
   ---------------------------------          ----------------------------------
        Jim Cheston                                Paul D. Meyer
                                                   Chief Financial Officer
By:                                        By:
   ---------------------------------          ----------------------------------

Date:  9/16/05                             Date:  9/6/05
     -------------------------------            --------------------------------


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                               OPTION(S) TO EXTEND
                             STANDARD LEASE ADDENDUM

         DATED MARCH 24, 2005
               -----------------------------------------------------------------

         BY AND BETWEEN (LESSOR) MOBILE PARK INVESTMENT, INC.
                                 -----------------------------------------------

         BY AND BETWEEN (LESSEE) INTERLINK ELECTRONICS, INC.
                                 -----------------------------------------------

         ADDRESS OF PREMISES: 546 FLYNN ROAD/3601 CALLE TECATE, CAMARILLO, CA
                              --------------------------------------------------

Paragraph 13

A        OPTION(S) TO EXTEND:
Lessor  hereby  grants to Lessee the option to extend the term of this Lease for
One (1) additional  Sixty (60) month  period(s)  commencing  when the prior term
expires upon each and all of the following terms and conditions

         (i) In order to exercise an option to extend,  Lessee must give written
notice of such  election to Lessor and Lessor  must  receive the same at least 6
but not more  than 9  months  prior to the date  that the  option  period  would
commence, time being of the essence If proper notification of the exercise of an
option is not given and/or  received,  such option shall  automatically  expire.
Options (if there are more than one) may only be exercised consecutively

         (ii) The  provisions  of  paragraph  39,  including  those  relating to
Lessee's  Default set forth in paragraph  39.4 of this Lease,  are conditions of
this Option

         (iii)  Except for the  provisions  of this Lease  granting an option or
options to extend the term, all of the terms and conditions of this Lease except
where specifically modified by this option shall apply.

         (iv) This  Option in  personal to the  original  Lessee,  and cannot be
assigned or exercised by anyone other than said  original  Lessee and only while
the  original  Lessee is in full  possession  of the  Premises  and  without the
intention of thereafter assigning or subletting.

         (v) The  monthly  rent for each  month of the  option  period  shall be
calculated as follows, using the method(s) indicated below
(Check Method(s) to be Used and Fill in Appropriately)

|_|      I. Cost of Living Adjustment(s) (COLA)
         a. On (Fill in COLA  Dates):  _________________________________________
the Base Rent  shall be  adjusted  by the  change,  if any,  from the Base Month
specified  below, in the Consumer Price Index of the Bureau of Labor  Statistics
of the U.S  Department  of Labor for (select  one) |_| CPI W (Urban Wage Earners
and  Clerical  Workers)  or |_| CPI U (All Urban  Consumers)  for (Fill in Urban
Area)


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All Items (1982-1984=100) herein referred to as "CPI"


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         b The monthly rent payable in accordance  with paragraph A I a. of this
Addendum shall be calculated as follows:  the Base Rent set forth in paragraph 1
5 of the attached Lease shall be multiplied by a fraction the numerator of which
shall be the CPI of the calendar month 2 months prior to the month(s)  specified
in paragraph A.I.a. above during which the adjustment is to take effect, and the
denominator  of which shall be the CPI of the  calendar  month which is 2 months
prior to (select one) |_| the first month of the term of this Lease as set forth
in paragraph 1 3 ("Base Month") or |_|(Fill in Other "Base Month"):

--------------------------------------------------------------------------------
The sum so calculated shall constitute the new monthly rent hereunder, but in no
event  shall any such new  monthly  rent be less than the rent  payable  for the
month immediately preceding the rent adjustment

         c In the event the compilation  and/or  publication of the CPI shall be
transferred to any other governmental department or bureau or agency or shall be
discontinued,  then the index  most  nearly the same as the CPI shall be used to
make  such  calculation.  In the event  that the  Parties  cannot  agree on such
alternative  index,  then the matter  shall be  submitted  for  decision  to the
American  Arbitration  Association  in  accordance  with the then  rules of said
Association  and the  decision  of the  arbitrators  shall be  binding  upon the
parties The cost of said Arbitration shall be paid equally by the Parties

|X|      II. Market Rental Value Adjustment(s) (MRV)
         a.  On (Fill in MRV  Adjustment  Date(s))  MARCH 1, 2010
                                                    ----------------------------
the Base Rent shall be adjusted to the "Market  Rental Value" of the property as
follows:

                  1) Four months prior to each Market  Rental  Value  Adjustment
Date described  above,  the Parties shall attempt to agree upon what the new MRV
will be on the  adjustment  date If agreement  cannot be reached,  within thirty
days, then
                           (a)  Lessor and Lessee  shall  immediately  appoint a
mutually acceptable appraiser or broker to establish the new MRV within the next
30 days. Any associated costs will be split equally between the Parties, or

                           (b) Both  Lessor  and Lessee  shall each  immediately
make a reasonable  determination  of the MRV and submit such  determination,  in
writing to arbitration in accordance with the following provisions

                                    (i)  Within 15 days  thereafter  Lessor  and
Lessee shall each select an |_|  appraiser or |X| broker  ("Consultant"  - check
one) of their choice to act as an arbitrator.  The two  arbitrators so appointed
shall  immediately  select a third  mutually  acceptable  Consultant to act as a
third arbitrator.

                                    (ii)  The 3 arbitrators shall within 30 days
of the  appointment  of the third  arbitrator  reach a  decision  as to what the
actual MRV for the Premises is, and whether  Lessor's or Lessee's  submitted MRV
is the closest thereto.  The decision of a majority of the arbitrators  shall be
binding on the Parties.  The submitted MRV which is determined to be the closest
to the actual MRV shall thereafter be used by the Parties.


                                       2
<PAGE>


                                    (iii)  If  either  of the  Parties  fails to
appoint an  arbitrator  within the  specified  15 days,  the  arbitrator  timely
appointed  by one of them  shall  reach a decision  on his or her own,  and said
decision shall be binding on the Parties

                                    (iv)  The  entire  cost of such  arbitration
shall be paid by the party whose  submitted  MRV is not  selected,  i.e. the one
that is NOT the closest to the actual MRV

                  2)  Notwithstanding  the  foregoing,  the new MRV shall not be
less  than  the  rent  payable  for the  month  immediately  preceding  the rent
adjustment

         b        Upon the establishment of each New Market Rental Value

                  1) the new MRV will become the new "Base Rent" for the purpose
of calculating any further Adjustments, and
                  2) the first  month of each  Market  Rental  Value  term shall
become  the new  "Base  Month"  for  the  purpose  of  calculating  any  further
Adjustments.

|_|      III. Fixed Rental Adjustment(s) (FRA)
The Base Rent shall be increased to the following amounts on the dates set forth
below:

      On (Fill in FRA Adjustment Date(s))      The New Base Rent shall be

      ----------------------------------       ---------------------------------

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      ----------------------------------       ---------------------------------

      ----------------------------------       ---------------------------------

      ----------------------------------       ---------------------------------

B. NOTICE:
         Unless specified  otherwise herein,  notice of any rental  adjustments,
other than Fixed Rental Adjustments,  shall be made as specified in paragraph 23
of the Lease

C. BROKER'S FEE:
         The Brokers shall be paid a Brokerage Fee for each adjustment specified
above in accordance with paragraph 15 of the Lease.

NOTE:  These forms are often modified to meet changing  requirements  of law and
needs of the  industry.  Always write or call to make sure you are utilizing the
most current form: AIR COMMERCIAL REAL ESTATE ASSOCIATION, 700 S. Flower Street,
Suite 600, Los Angeles, Calif 90017


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<PAGE>



                                    EXHIBIT A
                                   FLOOR PLAN

                      [Diagram of lease premises omitted.]