<PAGE>

                                                                   EXHIBIT 10.30

[TRIO-TECH LOGO]                    TRIO-TECH                        LOS ANGELES
                                  INTERNATIONAL                      SAN JOSE
                                 PRIVATE LIMITED                     DUBLIN
                                                                     SINGAPORE
                                                                     PENANG
                                                                     BANGKOK

27 May 2004

Industrial Development (High-Rise) Department                         RECEIVED
JTC Corporation                                                      27 MAY 2004
The JTC Summit
8 Jurong Town Hall Road
Singapore 609434

Attn: Soon Thiam CHENG

ACCEPTANCE OF OFFER OF TENANCY FOR THE PREMISES AT UNIT #02-15/16 BLK 1008 TOA
PAYOH NORTH TOA PAYOH NORTH INDUSTRIAL ESTATE SINGAPORE 318996

We refer to your letter of offer dated 26 May 2004 for the Tenancy and hereby
confirm our acceptance of all the covenants, terms and conditions of the Offer.

We are currently on GIRO, thus we enclose herewith a cheque for the amount of
$1826.69 and a Banker's/Insurance Guarantee for the amount of S$1591.13 (1
month's rental and service charge) as security deposit as confirmation of our
acceptance.

                                           /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
                                           /s/ Betty Ang
-------------------------------------------------------------------------------
Name of witness                         :  Ms Betty Ang
NRIC No.                                :  S6945849A

[ ] REGIONAL HEAD OFFICE  : 1008 Toa Payoh North #03-09 Singapore 318996
    Tel: 62653300 Fax: 62596355
<PAGE>
                                    RECEIVED
                                  26 MAY 2004
                             BY: still pending for
                            Mrs. Lee approval letter

                                       1

                                                                      [JTC LOGO]
                                                                     CORPORATION
PLEASE QUOTE OUR REFERENCE WHEN REPLYING
OUR REF : JTC(L) 3601/2506/TEMP 7

26 MAY 2004

                                                 JTC CORPORATION
                                                 The JTC Summit
TRIO-TECH INTERNATIONAL PTE LTD                  8 Jurong Town Hall Road
1008 TOA PAYOH NORTH                             Singapore 609434
#03-09
SINGAPORE (318996)                               customer          1800 568 7000
                                                 service hotline
                                                 main line        (65) 6560 0056
                                                 facsimile        (65) 6565 5301
(ATTENTION : BETTY ANG)                          website          www.jtc.gov.sg

                                                 BY LOCAL URGENT MAIL

Dear Sirs,

OFFER OF TENANCY FOR FLATTED FACTORY SPACE

1     We are pleased to offer a tenancy of the Premises subject to the
      covenants, terms and conditions in the annexed Memorandum of Tenancy No.
      27.09 ("the MT") and in this letter (collectively called "the Offer").

2     2.1   THE PREMISES:

            Private Lot A0618405 also known as Unit #02-15/16 ("the Premises")
            in BLK 1008 TOA PAYOH NORTH ("the Building") in the TOA PAYOH NORTH
            INDUSTRIAL ESTATE SINGAPORE 318996 as delineated and edged in red on
            the plan attached to the Offer.

      2.2   TERM OF TENANCY:

            3 years ("the Term") with effect from 1 AUGUST 2004 ("the
            Commencement Date").

      2.3   TENANCY:

            (a)   Your due acceptance of the Offer in accordance with Clause 3
                  of this letter shall, together with the Offer, constitute a
                  binding tenancy agreement ("the Tenancy").

            (b)   In the event of any inconsistency or conflict between any
                  covenant, term or condition of this letter and the MT, the
                  relevant covenant, term or condition in this letter shall
                  prevail.

<PAGE>
                                       2

                                                                      [JTC LOGO]
      2.4   AREA:

            Approximately 130.1 SQUARE METRES ("the Area").

      2.5   RENT:

            DISCOUNTED RENT

            (a)   Discounted rate of Dollars $9.98 per square metre per month on
                  the Area, for so long as you shall occupy by way of tenancy an
                  aggregate floor area of 5,000 to 9,999 square metres in the
                  Building or in the various flatted factories belonging to us;
                  and

            (b)   Discounted rate of Dollars $10.19 per square metre per month
                  on the Area, in the event that the said aggregate floor area
                  occupied is at any time reduced to between 1,000 to 4,999
                  square metres in the Building or in the various flatted
                  factories belonging to us; and

            (c)   Normal rate of Dollars $10.50 per square metre per month on
                  the Area, in the event that the said aggregate floor area
                  occupied is at any time reduced to below 1,000 square metres
                  (when the discount shall be totally withdrawn) with effect
                  from the date of reduction in the said aggregate floor area,

                  ("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.). After your first payment
                  is made in accordance with Clause 3 of this letter and the
                  attached Payment Table, the next payment shall be made on 01
                  SEPTEMBER 2004.

      2.6   SERVICE CHARGE:

            $2.25 PER SQUARE METRE PER MONTH ("Service Charge") on the Area as
            charges for services rendered by us, payable by way of additional
            and further rent without demand on the same date and in the same
            manner as the Rent, subject to our revision from time to time.

<PAGE>
                                       3

                                                                      [JTC LOGO]

2.7   SECURITY DEPOSIT/BANKER'S GUARANTEE:

      Ordinarily we would require a tenant to lodge with us a security deposit
      equivalent to THREE (3) MONTHS' rent and service charge. However, as an
      off-budget measure and as payment by GIRO has been made a condition with
      which you must comply under clause 3 of this letter, you shall, at the
      time of your acceptance of the Offer, place with us a deposit equivalent
      to ONE (1) MONTH'S Rent (at the discounted rate) and Service Charge
      ("Security Deposit") as security against any breach of the covenants,
      terms and conditions in the Tenancy, as follows:

      (a)   The Security Deposit may be in the form of cash or acceptable
            Banker's Guarantee in the form attached (effective from 1 JUNE 2004
            to 31 OCTOBER 2007), or such other form of security as we may in our
            absolute discretion permit or accept.

      (b)   The Security Deposit shall 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.

      (c)   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 shall immediately pay the amount of such
            increase or make good the deductions so that the Security Deposit
            shall at all times be equal to ONE (1) MONTH'S Rent (at the normal
            or discounted rate, as the case may be) and Service Charge.

      (d)   If at any time during the Term, your GIRO payment is discontinued,
            then you shall place with us, within two (2) weeks of the date of
            discontinuance of your GIRO payment, the additional sum equivalent
            to TWO (2) MONTHS' Rent and Service Charge, so that the Security
            Deposit shall at all times be equal to three (3) months' Rent (at
            the normal or discounted rate, as the case may be) and Service
            Charge for the remaining period of the Term.

<PAGE>
                                       4

                                                                      [JTC LOGO]

            (e)   If at any time during the Term the off-budget measure is
                  withdrawn you shall, if required in writing by us, also pay to
                  us the additional sum equivalent to TWO (2) MONTHS' Rent and
                  Service Charge, so that the Security Deposit shall at all
                  times be equal to THREE (3) MONTHS' Rent (at the normal or
                  discounted rate, as the case may be) and Service Charge for
                  the remaining period of the Term.

      2.8   MODE OF PAYMENT:

            (a)   Your first payment to be made with your letter of acceptance
                  in accordance with Clause 3 of this letter and the attached
                  Payment Table shall be by non-cash mode (eg, Cashier's Order,
                  cheque).

            (b)   Thereafter during the Term, you shall pay Rent, Service Charge
                  and GST by Interbank GIRO or any other mode to be determined
                  by us.

            (c)   You have an existing account with us from which we shall
                  deduct the aforesaid payments. You are therefore not required
                  to submit a duly completed GIRO form as part of the Mode of
                  Due Acceptance. But if you wish to have a separate GIRO
                  account to meet the aforesaid payments, please complete the
                  GIRO deduction form enclosed.

      2.9   AUTHORISED USE:

            You shall use the Premises for the purpose of MANUFACTURING AND
            ASSEMBLY OF ELECTRONIC EQUIPMENT only and for no other purpose
            whatsoever ("the Authorised Use").

      2.10  APPROVALS:

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

<PAGE>
                                       5

                                                                      [JTC LOGO]

      2.11  POSSESSION OF PREMISES:

            (a)   Subject to your acceptance of the Offer, keys to the Premises
                  shall be made available to you within the period of two (2)
                  months prior to the Commencement Date.

            (b)   From the date you accept the keys to the Premises ("Possession
                  Date") until the Commencement Date, you shall be deemed a
                  licensee upon the same covenants, terms and conditions as in
                  the Tenancy.

            (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:

                  (c1)  remove everything installed by you;

                  (c2)  reinstate the Premises to its original state and
                        condition; and

                  (c3)  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.

      2.12  LOADING CAPACITY:

            (a)   NORMAL (GROUND & NON-GROUND) FLOOR PREMISES:

                  You shall comply and ensure compliance with the following
                  restrictions:

                  (a1)  maximum loading capacity of the goods lifts in the
                        Building; and

                  (a2)  maximum floor loading capacity of 15 kiloNewtons per
                        square metre of the Premises on the 02 storey of the
                        Building PROVIDED THAT any such permitted load shall be
                        evenly distributed.

<PAGE>
                                       6

                                                                      [JTC LOGO]

      2.13  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
                  subject to the following:

                  (b1)  there shall be no breach of your obligations at the time
                        you make your request for a further term, and at the
                        expiry of the Term;

                  (b2)  the duration of the further term shall be mutually
                        agreed upon;

                  (b3)  the rent payable shall be at a revised rate to be
                        determined by us, having regard to the market rent of
                        the Premises at the time of granting the further term.
                        Our determination of the rent shall be final and
                        conclusive; and

                  (b4)  the tenancy for the further term shall be upon the same
                        covenants, terms and conditions except for the duration,
                        rent, security deposit (which shall be equivalent to
                        three (3) month's rent and service charge instead of two
                        (2) months), and excluding a covenant for renewal of
                        tenancy.

3     MODE OF DUE ACCEPTANCE:

      The Offer shall lapse if we do not receive the following by 31 MAY 2004:

      (a)   Duly signed letter of acceptance (IN DUPLICATE) of the Offer, in the
            form set out in the LETTER OF ACCEPTANCE attached. (PLEASE DATE AS
            REQUIRED IN YOUR LETTER OF ACCEPTANCE)

      (b)   Payment of the sum set out in the PAYMENT TABLE attached.

      (c)   Duly completed GIRO authorization form.

<PAGE>
                                       7

                                                                      [JTC LOGO]

4     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 those other items are not forthcoming from you within the time
      stipulated herein, the Offer shall lapse and there shall be no contract
      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.

5     RENT-FREE PERIOD:

      As the Commencement Date will not be deferred, we advise you to accept the
      Offer 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 2.11(c) of this letter.

6     VARIATION TO THE TENANCY:

      Any variation, modification, amendment, deletion, addition or otherwise of
      the Offer shall not be enforceable unless agreed by both parties and
      reduced in writing by us. No terms or representation or otherwise, whether
      expressed or implied, shall form part of the Offer other than what is
      contained herein.

7     CAR-PARKING SCHEME:

      The carpark for BLK 1008 TOA PAYOH NORTH is currently managed by P-PARKING
      INTERNATIONAL PTE LTD and you will have to observe and be bound by all the
      rules and regulations governing the use and operation of the carpark. You
      are requested to contact:

                               736B GEYLANG ROAD
                                SINGAPORE 389647
                                 TEL: 67494119
                                 FAX: 67493689

      on your use of the carpark.

<PAGE>
                                       8

                                                                      [JTC LOGO]

8     ELECTRICITY CONNECTION:

      Upon your acceptance of the Offer, you are advised to proceed
      expeditiously to engage a registered electrical consultant to submit two
      sets each of electrical single-line diagrams and electrical layout plans
      to and in accordance with the requirements of our FACILITIES MANAGEMENT
      SECTION, OPERATIONS SUPPORT DEPARTMENT OF OUR CUSTOMER SERVICES GROUP, for
      endorsement before an application is made to SP Services Ltd to open an
      account for electricity connection.

      Please contact the Facilities Management Section at BLK 25 KALLANG AVENUE
      #05-02 KALLANG BASIN INDUSTRIAL ESTATE SINGAPORE 339416 for their
      requirements.

9     To guide and assist you, we enclose a SCHEDULE OF STATUTORY CONTROLS for
      Flatted Factory Occupants.

Yours faithfully

/s/ SOON THIAM CHENG
--------------------
SOON THIAM CHENG

INDUSTRIAL DEVELOPMENT (HIGH-RISE) DEPARTMENT
INDUSTRIAL PARKS DEVELOPMENT GROUP
JTC CORPORATION
DID: 68833431
FAX: 68855899
Email: SOONTHIAM@JTC.GOV.SG

ENCS:

[x] Payment Table                 [x] GIRO Form(s)      [x] Specimen BG Plan

[x] Specimen Acceptance Form      [x] MT No. 27.09

[x] Schedule of Statutory Controls (SC2)]

<PAGE>
                                       9

                                                                      [JTC LOGO]

                                 PAYMENT TABLE

PREMISES : PRIVATE LOT A0618405 UNIT #02-15 /16 BLK 1008 TOA PAYOH NORTH TOA
PAYOH NORTH INDUSTRIAL ESTATE SINGAPORE 318996

<TABLE>
<CAPTION>
                                                      AMOUNT                   +5% GST
                                          -----------------------------        -------
<S>                                       <C>                <C>               <C>
Rent at $9.98 per square metre per
month on 130.1 square metres for
the period 1 AUGUST 2004 to 31
AUGUST 2004                               $ 1298.40                             $64.92

$2.25 per square metre per month
on 130.1 square metres for the
period 1 AUGUST 2004 to 31 AUGUST
2004                                      $  292.73                             $14.64

Total Rent Payable (inclusive of
Service Charge)                                              $ 1591.13          $79.56

SECURITY DEPOSIT equivalent to
three (3) months' Rent and Service
Charge (in cash or Banker's
Guarantee provided in accordance
with Clause 2.7 of this letter)           $ 4773.39

Less:
Equivalent of two (2) month's Rent
and Service Charge (re Off-budget
Measure and GIRO)                         $ 3182.26          $ 1591.13
</TABLE>

<PAGE>
                                       10

                                                                      [JTC LOGO]

<TABLE>
<S>                                         <C>              <C>                <C>
STAMP FEE payable on Letter of
Acceptance (which we will stamp on
your behalf)

Note: If the Letter is not returned
to us within 14 days of the date of
the Letter, you will have to pay
penalty on the stamp duty which is                           $  156.00
imposed by Stamp Duty Office of IRAS.

Sub-Total Payable                                            $ 3338.26          $79.56

ADD: GST @ 5%                                                $   79.56

Total Payable inclusive of GST                               $ 3417.82
</TABLE>

<PAGE>


[SPECIMEN ONLY - Please submit 2 original copies with signatures on your
company's letterhead]

                              LETTER OF ACCEPTANCE

Date : <To be dated on the day this letter
      is forwarded to JTC Corporation>

INDUSTRIAL DEVELOPMENT (HIGH-RISE) DEPARTMENT
JTC Corporation
The JTC Summit
8 Jurong Town Hall Road
Singapore 609434

ATTN: SOON THIAM CHENG

ACCEPTANCE OF OFFER OF TENANCY FOR THE PREMISES AT UNIT #02-15/16 BLK 1008 TOA
PAYOH NORTH TOA PAYOH NORTH INDUSTRIAL ESTATE SINGAPORE 318996

1.    We refer to your letter of offer dated 26 MAY 2004 for the Tenancy and
      hereby confirm our acceptance of all the covenants, terms and conditions
      of the Offer.

*2    We are currently *on GIRO/opting to pay by GIRO, thus we enclose herewith
      a cheque for the amount of $3417.82 (inclusive of 1 month's security
      deposit) as confirmation of our acceptance.

OR

*2    We are currently not on GIRO, thus we enclose herewith a cheque for the
      amount of $6600.08 (inclusive of 3 months' security deposit) as
      confirmation of our acceptance.

OR

*2    We are currently *on GIRO/opting to pay by GIRO, thus we enclose herewith
      a cheque for the amount of $1826.69 and a Banker's/ Insurance Guarantee
      for the amount of $1591.13 (1 month's rental and service charge) as
      security deposit as confirmation of our acceptance.

OR

<PAGE>
                                        2

*2    We are currently not on GIRO, thus we enclose herewith a cheque for the
      amount of $1826.69 and a Banker's/Insurance Guarantee for the amount of
      $4773.39 (3 months' rental and service charge) as security deposit as
      confirmation of our acceptance.

*3    We also enclose herewith a duly completed GIRO authorization form.

___________________________
Name of authorized signatory:
Designation:

FOR AND ON BEHALF OF:

_______________________________
TRIO-TECH INTERNATIONAL PTE LTD:

IN THE PRESENCE OF:

_______________________________
Name of witness:
NRIC No:

*     PLEASE OMIT IF NOT APPLICABLE

LTTR ACCEPTANCE/PTE LTD/JUNE 2002/LG FF RV TEAM
<PAGE>

                                              SPECIMEN BANK'S/FINANCE COMPANY'S/
                                              INSURANCE COMPANY'S GUARANTEE FORM

                                    GUARANTEE
                       (Please use guarantor's letterhead)

TO: JTC CORPORATION
    THE JTC SUMMIT
    8 JURONG TOWN HALL ROAD
    SINGAPORE 609434

WHEREAS:

[TRIO-TECH INTERNATIONAL PTE LTD] of [1008 TOA PAYOH NORTH 03-09 SINGAPORE
318996] ("the Tenant") is a tenant of the premises known as [UNIT #02-15/16 BLK
1008 TOA PAYOH NORTH TOA PAYOH NORTH INDUSTRIAL ESTATE SINGAPORE 318996] ("the
Premises") pursuant to a letter of offer dated [ 26 MAY 2004 ] from you to and
duly accepted by the Tenant ("the Tenancy", which expression shall include any
written amendments made to the Tenancy from time to time).

IN CONSIDERATION OF your agreeing to grant the Tenancy and pursuant to a term of
the Tenancy, we, the undersigned, hereby unconditionally undertake to pay to you
from time to time on first demand the sum or aggregate sums not exceeding
[$____________] ("the Full Guaranteed Sum") if accompanied by your statement
that the Tenant is in breach of any of the Tenant's Obligations to you under the
Tenancy and that the amount demanded is due and payable to you and remains
unpaid Provided That our liability under this Guarantee shall not exceed the
Full Guaranteed Sum.

Our liability under this Guarantee shall be that of a principal debtor and not
by way of surety and such liability shall not be discharged or affected by any
event, act or omission whereby our liability would have been discharged if we
had been a surety.

This Guarantee is valid from [1 JUNE 2004] and shall expire on [31 OCTOBER 2007]
("the expiry date") and our liability hereunder shall cease in respect of any
claims made after the expiry date.

Notwithstanding that this Guarantee may not have expired, our liability
hereunder shall cease forthwith upon our paying to you the Full Guaranteed Sum
to be held by you as a security deposit under the Tenancy.

Date:___________________

[SIGNATURE, NAMES AND DESIGNATIONS OF AUTHORISED SIGNATORIES OF
BANK/FINANCE COMPANY/INSURANCE COMPANY AND RUBBER STAMP OF
BANK/FINANCE COMPANY/INSURANCE COMPANY]

BG(Security Deposit)/Tenancy/13.014/June 2002/Lg FF RV team