<PAGE>

                                                                   EXHIBIT 10.17

  TRIO-TECH
  ---------
INTERNATIONAL

5 January 2000

Marketing & Sales Department                   [STAMP]    BY HAND
                                                          -------
Jurong Town Corporation
Jurong Town Hall
301 Town Hall Road
Singapore 609431

Dear Ms Lai Get Luan


ACCEPTANCE OF OFFER OF TENANCY FOR THE PREMISES AT BLK 1008 TOA PAYOH NORTH #03-
01 TO #03-06 TOA PAYOH INDUSTRIAL ESTATE SINGAPORE 318996

1.   We refer to your letter of dated 3 January 2000 for the Tenancy and hereby
     confirm our acceptance of all the covenants, terms and conditions
     stipulated therein.

2.   We enclose herewith a cheque for the amount of S$ 10,295.52 and the
     Banker's guarantee as security deposit as confirmation of our acceptance.

3.   In addition, we also enclose herewith a duly completed GIRO authorization
     form as requested by you for your information and record.



By: /s/ Lee Siew Kuan
-------------------------------------------------------

Name of.authorized signatory  :  Mrs Lee Siew Kuan
Designation                   :  Director of Logistics
For and on behalf of

TRIO-TECH INTERNATIONAL PTE LTD

In the presence of


By: /s/ Betty Ang
-------------------------------------------------------
Name of Witness               :  Miss Betty Ang
NRIC No.                      :  S6945849A
<PAGE>

Pk

JTC(L)3601/2506ALGL/SN                            DID - 5688574
                                                  FAX; 5688593
                                                  Email: getluan@jtc.gov.sg


03 January, 2000                                  JTC



Trio-Tech International Pte Ltd
Blk 1008 Toa Payoh North
#03-09 to #03-15
Toa Payoh Industrial Estate
Singapore -318996

(Attn: Mrs Lee Siew Kuan/Ms Betty Ang)


Dear Sirs.


OFFER OF TENANCY FOR FLATTED FACTORY SPACE


I    We are pleased to offer a tenancy of the Premises subject to the following
     covenants, terrns, and conditions in this letter and in the annexed
     Memorandum of Tenancy ("the Offer"):

     1.01 Location:

          Pte Lot A19597(a), Blk 1008 ("the Building"), Toa Payoh North #03-01
          to #03-06 Toa Payoh Industrial Estate Singapore 318996 ("the
          Premises") as delineated and edged in red on the plan attached to the
          Offer.

     1.02 Term of Tenancy.-

          3 years ("the Term") with effect from 01 March 2000 ("the Commencement
          Date").

     1.03 Tenancy Agreement:

          Upon due acceptance of the Offer in accordance with clause 2 of this
          letter, you shall have entered into a tenancy apartment with US ("the
          Tenancy") and will be bound by the covenants, terms and conditions
          thereof

          In the event of any inconsistency or conflict between any covenant,
          term or condition of this letter and the Memorandum of Tenancy, the
          relevant covenant, term or condition in this letter shall prevail.

     1.04 Area:

          Approximately 682.40 square metres (subject to survey)-
<PAGE>

                                                                    2
                                                         Jurong Town Corporation



     1.05 Rent and Service Charge:

          (a)  Discounted rate of $12.03 per square metres for so long as the
               Tenant shall occupy by way of tenancy an aggregate floor area of
               not less than 1000 square metres in the Building or in the
               various flatted factories belonging to the Landlord, and

          (b)  Normal rate of $12.40 per square metres with effect from the date
               the said aggregate floor area occupied is reduced to below 1,000
               square metres (ie. when the discount shall be totally withdrawn),

               ("Rent") to be paid without demand and in advance without
               deduction on the 1st day of each month of the year (i.e. 1st of
               January, February, March, etc.) The next payment shall be made on
               01 April 2000.

          Service charge;

          $2.10 per square metre per month, ("Service Charge") as charges for
          services rendered by us, payable without demand on the same date and
          in the same manner as the Rent, subject to out revision from time to
          time,

     1.06 Security Deposit/Banker's Guarantee:

          You will at the time of acceptance of the Offer be required to place
          with us a deposit of $28,926.94 equivalent to 3 morkths' Rent (at the
          discounted rate) and Service Charge ("Security Deposit') as security
          against any breach of the covenants, terms and conditions in the
          Tenancy.

          The Security Deposit may be in the form of cash and/or acceptable
          Banker's Guarantee in the form attached (effective frorn 01 January
          2000 to 31 August 2003) and/or such other form of security as we may
          in our absolute discretion permit or accept.

          The Security Deposit must be maintained at the same sum throughout the
          Term and shall be repayable-to you without interest or returned to you
          for cancellation, after the termination of the Term (by expiry or
          otherwise) or expiry of the Banker's Guarantee, as the case may be,
          subject to appropriate deductions or payment to us for damages or
          other sums due under the Tenancy.

          If the Rent at the discounted rate is increased to the normal rate or
          Service Charge is increased or any deductions are made from the
          Security Deposit, you are to immediately pay the amount of such
          increase or make good the deductions so that the Security Deposit
          shall at all times be equal to 3 months' Rent and Service Charge.
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                                                                    3
                                                         Jurong Town Corporation

1.07  Mode of Payment:

      Except for the payment to be made with your letter of acceptance pursuant
      to clause 2 of this letter, during the Term, you shall pay Rent, Service
      Charge and GST by Interbank GIRO or any other mode to be determined by us.

      Accordingly, you are to provide us with the duly completed GIRO
      authorization form enclosed herewith.

      However, pending finalisation for the GIRO arrangement, you shall pay
      Rent; Service Charge and GST as they fall due by cheque.

1.08  Permitted use:

      (a) Subject to clause 1.12 of this letter, you shall commence full
          operations within four (4) months of the Commencement Date for the
          purpose of IC testing, services and packing for semi-conductor
          industry only and for no other purpose whatsoever ("the Authorised
          Use").

      (b) Thereafter, you shall maintain full and continuous operations and
          use and occupy the whole of the Premises for the Authorised Use.

      (c) Subject to clauses (a) and (b) above, you shall use and occupy at
          least sixty percent (60%) of the gross floor area of the Premises for
          industrial activities and ancillary stores, and use and occupy the
          remaining gross floor area, if any. for offices, neutral areas,
          communal facilities and such other uses as may be approved in writing
          by us and the relevant governmental and statutory authorities PROVIDED
          THAT you shall not use and occupy the Premises for the purpose of
          commercial office and storage unrelated to the Authorised Use.

1.09  Approvals

      The Tenancy is subject to approvals being obtained from the relevant
      government and statutory authorities.

1.10  Possession of Premises:

      (a) Keys to the Premises will be given to you two (2) months prior to the
          Commencement Date subject to due acceptance of the Offer ("Possession
          Date"),

      (b) From the Possession Date until the Commencement Date you shall be
          deemed a licensee upon the some terms and conditions in the Tenancy.
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                                                                    4
                                                         Jurong Town Corporation


     (c)  If you proceed with the Tenancy after the Commencement Date, the
          licence fee payable from the Possession Date to the Commencement Date
          shall be waived ("Rent-Free Period"). Should you fail to so proceed,
          you shall:

          (i)   remove everything installed by you.;
          (ii)  reinstate the Premises to its original state and condition; and
          (iii) pay us a sum equal to the prevailing market rent payable for the
                period from the Possession Date up to the date the installations
                are removed and reinstatement completed to our satisfaction,

          without prejudice to any other rights and remedies we may have against
          you under the Tenancy or at law.

1.11 Preparation and Submission of Plans:

     (a)  No alteration, addition, improvement, erection, installation or
          interference to or in the Promises or the fixtures and fittings
          therein is permitted without Building Control Unit [BCU(JTC)] prior
          written consent. Your attention is drawn to clauses 2.10 to 2.19 and
          2.34 of die Memorandum of Tenancy-

     (b)  You will be required to prepare and submit floor layout plans of your
          factory and plans of the air-conditioning works in accordance with the
          terms of the tenancy and the 'Guide' attached. It is important that
          you should proceed with the preparation and submission of the plans in
          accordance with the procedures set out in the said 'Guide'.

     (c)  Should there be alteration of existing automatic fire alarm and
          sprinkler system installation, alteration plans shall be submitted to
          Building Control Unit [BCU(ITC)] for approval on fire safety aspects.
          All air-conditioning, fire alarm & sprinkler system plans must be
          signed by a relevant Professional Engineer, registered with the
          Professional Engineers Board of Singapore.

     (d)  Upon due acceptance of the Offer, a copy of the floor and elevation
          plans (transparencies) will be issued to you to assist in the
          preparation of the plans required herein.

     (e)  No work shall commence until the plans have been approved by Building
          Control Unit (BCU(JTC)].

1.12 Final inspection:

          You shall ensure that final inspection by us of all installations is
          carried out and our approval of the same is obtained before any
          operations in the Premises may he commenced.
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                                                                               5

                                                         Jurong Town Corporation

     1.13 Special Conditions:

          1    You shall comply and ensure compliance with the following
               restrictions-

               (a)  maximum loading capacity of the goods lifts in the
                    Building,; and

               (b)  maximum floor loading capacity of 15.00 kiloNewtons per
                    square metre of the Premises on the 3rd storey of the
                    Building PROVIDED THAT any such permitted load shall be
                    evenly distributed.

               We shall not be liable for any loss or damage that you may suffer
               from any subsidence or cracking of the ground floor slabs and
               aprons of the Building.

          2    Option for renewal of tenancy:
               ------------------------------

               (a)  You may within 3 months before the expiry of the Term make a
                    written request to us for a further term of tenancy.

               (b)  We may grant you a further term of tenancy of the Premises
                    upon mutual terms to be agreed between you and us subject to
                    the following:

                    (i)   there shall be no breach of your obligations at the
                          time you make your request for a further term;

                    (ii)  our determination of revised rent, having regard to
                          the market rent of the Premises at the time of
                          granting the further term, shall be final;

                    (ii)  we shall have absolute discretion to determine such
                          covenants, terms and conditions, but excluding a
                          covenant for renewal of tenancy; and

                    (iv)  there shall not be any breach of your obligations at
                          the expiry of the Term.

2.   Mode of Acceptance:

     The Offer shall lapse if we do not receive the following by 07 January
     2000:-

     .    Duly signed letter of acceptance (in duuplicate) of all the covenants,
          terms and conditions in the Tenancy in the form enclosed at the
          Appendix.
          (Please date as required in the Appendix)

     .    Payment of the sum set out in clause 4.

     .    Duly completed GIRO authorization form.
<PAGE>

                                                                               6

                                                         Jurong Town Corporation

3.   Please note that payments made prior to your giving us the other items
     listed above may be cleared by and credited by us upon receipt. However, if
     the said other items are not forthcoming from you within the time
     stipulated herein, the Offer shall lapse and there shall be no contact
     between you and us arising hereunder. Any payments received shall then be
     refunded to you without interest and you shall have no claim of whatsoever
     nature against us.

4    The total amount payable is as follows:

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------
                                                 AMOUNT                           +3% GST
--------------------------------------------------------------------------------------------
<S>                                              <C>             <C>              <C>
Rent:
Rent at $12.03 psm per month on
682.40 sqm for period 01 March 2000 to           $8,209.27
31 March 2000

Less--
6.6% Property tax rebate on rental value
(01/07/1998 to 30/06/2000)                       $  541.91
                                                 ---------
                                                 $7,667.46
--------------------------------------------------------------------------------------------
Service Charge:

Service Charge at $2,10 psm per
month on 682.40 sqm for period
01 March 2000 to 31 March 2000                   $1,431.04       $ 9,100.50       $273.02
                                                 ---------
--------------------------------------------------------------------------------------------
Deposit equivalent to three months' rent
and service charge (or Banker's
Guarantee provided in accordance witb
sub-paragraph 1.06 above)                                        $28,926.94
--------------------------------------------------------------------------------------------
Stamp fee payable on Letter of
Acceptance, which will be stamped by
JTC on your behalf                                               $   922.00
--------------------------------------------------------------------------------------------
Sub-Total Payable                                                $38,949,44       $273.02
--------------------------------------------------------------------------------------------
Add- 3 % GST                                                     $   273.02
                                                                 ----------
--------------------------------------------------------------------------------------------
Total Amount Payable                                             $39,222.46
                                                                 ----------
--------------------------------------------------------------------------------------------
</TABLE>
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                                                                               7

                                                         Jurong Town Corporation

5.   Rent-Free Period:

     As the Commencement Date will not be deferred, we advise you to accept the
     0ffer as soon as possible and to collect the keys to the Premises on the
     scheduled date in order to maximize the Rent-Free Period referred to in
     clause 1.10(c) of this letter.

6.   Variation to the Tenancy

     This letter and the Memorandum of Tenancy constitute the full terms and
     conditions governing the Offer and no terms or representation or otherwise,
     whether express or implied, shall form part of the Offer other than what is
     contained herein. Any variation, modification, amendment, deletion,
     addition or otherwise of the covenants, terms and conditions of the Offer
     shall not be enforceable unless agreed, by both parties and reduced in
     writing by us.

7.   Car-Parking Scheme:

     (a)  The car park for Blk 1008 is currently managed by a Tenants' Committee
          and you will:

          (i)  have to contribute towards all the operational and management
               costs, if any, incurred in connection with the car parks;

          (ii) observe and be bound by all the rules and regulations governing
               the use and operation of the car park. A copy of the Tenant
               Committees current rules and regulations is obtainable from the
                                                        ------------------
               Tenants& Committee. You are required to contact:

               Ms Susan Ng
               Wilson Parking (S) Pte Ltd
               32 Sultan Centre
               Singapore 198480
               Tel No: 2966600

               a member of the Committee, on your use of the car park.

     (b)  The Corporation shall not be liable for any loss, damage, injury,
          liabilities, claim or action you may sustain or suffer in the use of
          the car park and the tenants shall fully indemnify the Corporation
          against any loss, claims, penalties, demands, damage arising from the
          private management and operations of the car park by the tenants.
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                                                                               8
                                                         Jurong Town Corporation

8.   Application for Approvals, Utilities etc.

     Upon your acceptance of the covenants, terms and conditions of the Offer,
     you are advised to proceed expeditiously as follows:

     8.01  Preliminary Clearance:

           Comply with the requirements of the Chief Engineer (Central Building
           Plan Unit); Pollution Control Department and/or other departments
           pursuant to your application/s for preliminary clearance. (Please
           note that we have referred your application to the relevant
           department/s)

     8.02  Discharge of Trade Effluence:

           Complete the attached Application for Permission to Discharge Trade
           Effluent into Public Sewer and return the application form direct to
           the Read, Pollution Control Department Ministry of Environment,
           Environment Building, 40 Scotts Road Singapore 229231 (Telephone No.
           7327733).

     8.03  Electricity:

           Engage a registered electrical consultant or competent contractor to
           submit three sets of electrical single-line diagrams to and in
           accordance with the requirements of our Property Support Department
           (PSD), Customer Services Group, ITC East Zone Office for endorsement
           before an application is made to the Power Supply Pte Ltd to open an
           account for electricity connection. Please contact our Property
           Support Department (PSD) at Blk 25 Kallang Avenue #05-01 Kallang
           Basin Industrial Estate Singapore 339416 direct for their
           requirements.

     8.04  Water:

           Submit four copies of sketch plans, prepared by a licensed plumber,
           showing the section and layout of the plumbing, to our Building
           Control Unit [BCU(JTC)] for approval prior to the issue of a letter
           to Water Conservation Department Public Utilities Board to assist you
           in your application for a water sub-meter.

     8.05  Telephone:

           Apply direct to Singapore Telecommunications Ltd for all connections.
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                                                                               9

                                                         Jurong Town Corporation

     8.06  Automatic Fire Alarm System (Incorporating Heat Detector)

           Engage a registered electrical consultant/professional engineer to
           submit two sets of fire alarm drawings, indicating the existing
           fixtures if any, the proposed modifications of the fire alarm and the
           layout of machinery, etc to and in accordance with the requirements
           of our Building Control Unit [BCU(JTC)]. Please contact our Building
           Control Unit (BCU(JTC)] at 301 Jurong Town Hall Road (3rd level)
           Singapore 609431 direct for further requirements.

     8.07  Factory Inspectorate

           Complete and return direct to Chief Inspector of Factories the
           attached form, "Particulars to be submitted by occupiers or Intending
           Occupiers of Factories".

Yours faithfully

By: /s/ Lai Get Luan

LAI GET LUAN (Ms)
MARKETING & SALES DEPARTMENT
INDUSTRIAL PARKS DEVELOPMENT GROUP
JURONG TOWN CORPORATION
Attd