KNZ484132-Way Portable FM Wrist-worn Radio Transceiver (FR

March 10, 2000 Federal Communications Commission Equipment Approval Services 7435 Oakland Mills Road Columbia, MD 21046 SUBJECT:DSI (HK) LTD. FCC ID: KNZ48416 731 Confirmation Number: EA96984 To Whom It May Concern: Submitted herewith, on behalf of DSI (HK) LTD., is an amendment to the FCC Form 731, submitted on March 08, 2000, for the subject application. The correct product code listed in Item 3 should be 48413. The original Form 731 was inadvertently submitted as 48416 instead of a 48413. If you have any questions, please do not hesitate to contact us. Thank you. Sincerely, Michael Krauss PCTEST Lab cc:Mr. Tommy Yau Managing Director DSI (HK) Ltd.

March 8, 2000 Federal Communications Commission Equipment Approval Services 7435 Oakland Mills Road Columbia, MD 21046 SUBJECT:DSI (HK) Ltd. FCC ID: KNZ48413 Part 95 Certification Gentlemen: Submitted herewith, on behalf of DSI (HK) Ltd., is an application for Part 95 Certification of the following 2-Way Portable FM Wrist-worn Radio Transceiver (FRS): FCC ID:KNZ48413 Model(s):48413 EUT Classification:Family Radio Body-Worn Transmitter (FRT) Tx/Rx Freq. Range:462.6375 MHz Max. Output Power:0.1 Watts Attached is the letter of authorization, measurement report data and plots, FCC ID label and location, test setup photographs, internal and external photographs, block diagram, schematic diagrams, operational description, and the user's manual. Should you have any questions or comments concerning the above, please contact the undersigned. cc:Mr. Tommy Yau DSI (HK) Ltd.

Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS)

© 2000 PCTEST Lab FCC ID SAMPLE LABEL & LOCATION LABELLING REQUIREMENTS PER §§ 2.925 The Label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time of purchase. FCC ID: KNZ48413

Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS)

© 2000 PCTEST Engineering Lab., Inc. PCTEST Engineering Laboratory, Inc. 6660-B 6660-B DobbinDobbin Road Road •• Columbia, MD 21045 Columbia, MD 21045 •• U.S.A. U.S.A. TEL (410) 290-6652 TEL (410) 290-6652 •• FAX (410) 290-6654 FAX (410) 290-6654 http://www.pctestlab.comhttp://www.pctestlab.com CERTIFICATE OF COMPLIANCE FCC Part 95 Certification DSI (HK) LTD.Dates of Tests: February 16-18, 2000 Rm 803-6 World Finance CentreTest Report S/N: 95.200207075.KNZ South Tower, Harbour CityTest Site: PCTEST Lab, MD U.S.A. Tsimshatsui, Kowloon, Hong Kong Attention: Mr. Tommy Yau, Managing Director FCC ID KNZ48413 APPLICANT DSI (HK) LTD. Classification:Family Radio Body-worn Transmitter (FRT) FCC Rule Part(s):§§§ 95(B), 2(J) EUT Type:2-Way Portable Wrist-worn Radio Transceiver (FRS) Trade Name(s):DSI (HK) LTD. Model(s):48413 Tx/Rx Frequency Range:462.6375 MHz Max. RF Output Power:0.1 W Frequency Tolerance:0.0025% (2.5 ppm) Emission Designator:8K0F3E Channel Capacity:1 This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report and was tested in accordance with the measurement procedures specified in §2.947 with the following remarks (Note Codes): • (BC) The output power is continuously variable from the value listed in this entry to 5%-10% of the value listed. I attest to the accuracy of data. All measurements reported herein were performed by me or were made under my supervision and are correct to the best of my knowledge and belief. I assume full responsibility for the completeness of these measurements and vouch for the qualifications of all persons taking them. PCTEST certifies that no party to this application has been denied the FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). 200207075.KNZ Certification © 2000 PCTEST Engineering Laboratory, Inc.FCC Part 95 TABLE OF CONTENTS ATTACHMENT A: COVER LETTER(S) ATTACHMENT B: ATTESTATION STATEMENT(S) ATTACHMENT C: TEST REPORT SCOPE 1 INTRODUCTION 2 2.1033 INSERTS 3 DESCRIPTION OF TESTS 4-6 RADIATED MEASUREMENTS 7 FREQUENCY STABILITY 8-9 PLOTS OF EMISSIONS 10 LIST OF TEST EQUIPMENT 11 SAMPLE CALCULATIONS 12 CONCLUSION 13 ATTACHMENT D: TEST PLOTS ATTACHMENT E: FCC ID LABEL & LOCATION ATTACHMENT F: TEST SETUP PHOTOGRAPHS ATTACHMENT G: EXTERNAL PHOTOGRAPHS ATTACHMENT H: INTERNAL PHOTOGRAPHS ATTACHMENT I: BLOCK DIAGRAM(S) ATTACHMENT J: SCHEMATIC DIAGRAM(S) ATTACHMENT K: OPERATIONAL DESCRIPTION ATTACHMENT L:USER’S MANUAL Test Report S/N: 95.200207075.KNZFCC Part 95 Dates of Tests: February 16-18, 2000Certification © 2000 PCTEST Lab2-Way Portable FM Wrist-worn Radio Transceiver (FRS)1 DSI (HK) LTD. FCC ID: KNZ48413 (Tx/Rx 462.6375MHz) MEASUREMENT REPORT 1.1 Scope Measurement and determination of electromagnetic emissions (EME) of radio frequency devices including intentional and/or unintentional radiators for compliance with the technical rules and regulations of the Federal Communications Commission. §2.1033 General Information Applicant Name:DSI (HK) LTD. Address:Rm 803-6 World Finance Centre South Tower, Harbour City Tsimshatsui, Kowloon, Hong Kong Attention:Mr. Tommy Yau, Managing Director • FCC ID:KNZ48413 • Model(s):48413 • Quantity:Quantity production is planned • Emission Designator:8K0F3E • Tx/Rx Freq. Range:462.6375 MHz • Equipment Class:Family Radio Body-Worn Transmitter (FRT) • Equipment Type:2-Way Portable FM Wrist-worn Radio Transceiver (FRS) • Modulation:FM • Frequency Tolerance:± 0.0025% (2.5 ppm) • Max. Power:0.1W • FCC Rule Part(s):§§§§ 95(B), 2(J) • Power Supply:(4) 1.5 VDC LR44 Alkaline batteries • Dates of Tests:February 16-18, 2000 • Place of Tests:PCTEST Lab, Columbia, MD U.S.A. • Test Report S/N:95.200207075.KNZ Test Report S/N: 95.200207075.KNZFCC Part 95 Dates of Tests: February 16-18, 2000Certification © 2000 PCTEST Lab2-Way Portable FM Wrist-worn Radio Transceiver (FRS)2 DSI (HK) LTD. FCC ID: KNZ48413 (Tx/Rx 462.6375MHz) 2.1 INTRODUCTION These measurement tests were conducted at PCTEST Engineering Laboratory, Inc. facility in New Concept Business Park, Guilford Industrial Park, Columbia, Maryland. The site address is 6660-B Dobbin Road, Columbia, MD 21045. The test site is one of the highest points in the Columbia area with an elevation of 390 feet above mean sea level. The site coordinates are 39° 11'15" N latitude and 76° 49'38" W longitude. The facility is 1.5 miles North of the FCC laboratory, and the ambient signal and ambient signal strength are approximately equal to those of the FCC laboratory. There are no FM or TV transmitters within 15 miles of the site. The detailed description of the measurement facility was found to be in compliance with the requirements of § 2.948 according to ANSI C63.4 on October 19, 1992. Measurement Procedure The radiated and spurious measurements were made outdoors at 3-meter test range (see Figure2). The equipment under test is placed on the turntable connected to a RF wattmeter and a dummy RF load, and then its power is adjusted to its rated output. A receiving antenna located 2 meters from the turntable picks up any signal radiated from the transmitter. The turntable containing the system was rotated; the receiving antenna height was varied 1 to 4 meters and stopped at the azimuth or height producing the maximum emission. The testing procedure is repeated for both horizontal and vertical polarization of the receiving antenna. The actual radiated signal strength is obtained by substitution method with a signal generator with a calibrated output. The signal generator is adjusted in output until its reading is identical to that obtained when the receiving antenna is connected to the receiver. Signal strength is then read directly from the signal generator. Figure 1. Map of the Greater Baltimore and Metropolitan Washington, D.C. area. Figure 2. 3-meter outdoor test site Test Report S/N: 95.200207075.KNZFCC Part 95 Dates of Tests: February 16-18, 2000Certification © 2000 PCTEST…

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Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS) Test Report S/N: 95.200207075.KNZFCC Part 95 Test Date(s): February 16-18, 2000Certification © 2000 PCTEST Lab FCC ID: KNZ48413 (Tx/Rx 462.6375 MHz) NVLAP Lab Code: 100431-0 DSI (HK) Ltd. 2-Way Portable FM Wrist-worn Radio Transceiver (FRS)