KNZ48521Wireless Sun Glass Walkie Talkie

September 12, 2001 Federal Communications Commission Equipment Approval Services 7435 Oakland Mills Road Columbia, MD 21046 SUBJECT: DSI (HK) Ltd. FCC ID: KNZ48521 Part 95 Certification Gentlemen: Submitted herewith, on behalf of DSI (HK) Ltd., is an application for Part 95 Certification of the following Wireless Sun Glass Walkie Talkie (FRS): FCC ID: KNZ48521 Model(s): 48521 EUT Classification: Wireless Sun Glass Walkie Talkie (FRS): Tx/Rx Freq. Range: 462.6375 MHz Max. Output Power: 0.0012 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, 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.

November 9, 2001 Federal Communications Commission Equipment Approval Services 7435 Oakland Mills Road Columbia, MD 21046 Attn: Mr. Diane Poole SUBJECT: DSI (HK)Ltd. FCC ID: KNZ48521 731 Confirmation No.: EA102420 Correspondence Reference No.: 21202 Request for Tech. Info.: 11/08/01 Dear Diane: Transmitted herewith, on behalf of DSI (HK) Ltd. is an amendment provided in response to the request for technical information dated November 8, 2001. 1. Please find attached the operational description. We trust this information is sufficient for the immediate grant of this application. If you have any further questions, please do not hesitate to contact us. cc: DSI (HK) Ltd.

© 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS)

© 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS)

TSUEN SHING ENTERPRISES LIMITED Flat 8-10, 8/F., Kar Wah Ind. Bldg., Hei Yip St., Yuen Long, N.T., Hong Kong Tel: (852) 24740130 Fax: (852) 24731801 Email:[email protected] 48521 Circuit Description Transmitter Oscillate circuit: 1. Oscillating circuit consists of L4,L5,C29,C30,C31,Q4. 2. The RF amp and the tuned circuit are made of Q5,Q6,L6,L7,R17 RX amp circuit: 1. It consists of the Q1,R1,R2 2. L3,C5,C4,L2,Q2 make the RX local-oscillating circuit. 3. The audio power amp is made of the component IC386, etc. 4. Voltage regulator circuit is made of the component IC2 Antenna, Ground and Power Source: The antenna consists of a 46mm long telescoping chrome over brass tubing. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by 6 Volt. (battery size: AG13/ LR44,1.5V x 4) primary battery.

© 2001 PCTEST Engineering Lab., Inc. PCTEST Engineering Laboratory, Inc. 6660-B Dobbin Road • Columbia, MD 21045 • U.S.A. TEL (410) 290-6652 • FAX (410) 290-6654 http://www.pctestlab.com CERTIFICATE OF COMPLIANCE FCC Part 95 Certification DSI (HK) LTD. Dates of Tests: September 9-10, 2001 Suite 1401, 14/F, New T & T Centre Test Report S/N: 95.210821520.KNZ Harbour City, Tsimshatsui Test Site: PCTEST Lab, MD U.S.A. Kowloon, Hong Kong Attention: Mr. Tommy Yau, Managing Director FCC ID KNZ48521 APPLICANT DSI (HK) LTD. Classification: Family Radio Face Held Transmitter (FRF) FCC Rule Part(s): §§§ 95(B), 2(J) EUT Type: Wireless Sun Glass Walkie Talkie (FRS) Trade Name(s): Micro Link Shades Model(s): 48521 Tx/Rx Frequency Range: 462.6375 MHz Max. RF Output Power: 0.0012 W Frequency Tolerance: 0.00025% (2.5 ppm) Emission Designator: 10K0F3E 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. 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. 862. 210821520.KNZ Certification © 2001 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 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: USER’S MANUAL Test Report S/N: 95.210821520.KNZ FCC Part 95 Dates of Tests: September 9-10, 2001 Certification © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) 1 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) 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. General Information Applicant Name: DSI (HK) LTD. Address: Suite 1401, 14/F, New T & T Centre Harbour City, Tsimshatsui Kowloon, Hong Kong Attention: Mr. Tommy Yau, Managing Director • FCC ID: KNZ48521 • Model(s): 48521 • Quantity: Quantity production is planned • Emission Designator: 10K0F3E • Tx/Rx Freq. Range: 462.6375 MHz • Equipment Class: Family Radio Face Held Transmitter (FRF) • Equipment Type: Wireless Sun Glass Walkie Talkie (FRS) • Modulation: FM • Frequency Tolerance: ± 0.00025% (2.5 ppm) • Max. Power: 0.0012 W • FCC Rule Part(s): §§§§ 95(B), 2(J) • Power Supply: (4) 1.5 VDC Alkaline batteries • Dates of Tests: September 9-10, 2001 • Place of Tests: PCTEST Lab, Columbia, MD U.S.A. • Test Report S/N: 95.210821520.KNZ Test Report S/N: 95.210821520.KNZ FCC Part 95 Dates of Tests: September 9-10, 2001 Certification © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) 2 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) 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 a 3-meter test range (see Figure2). The equipment under testing was placed on a wooden turntable, 3-meters from the receive antenna. The receive antenna height and turntable rotations was adjusted for the highest reading on the receive spectrum analyzer. A half-wave dipole was substituted in place of the EUT. This dipole antenna was driven by a signal generator and the level of the signal generator was adjusted to obtain the same receive spectrum analyzer reading. This level was recorded. For readings above 1 GHZ, the above procedure would be repeated using horn antennas and the difference between the gain of the horn and an isotropic antenna are taken into consideration. Figure 1. Map of the Greater Baltimore and Metropolitan Washington, D.C. area. Figure 2. 3-meter outdoor test site Test Report S/N: 95.210821520.KNZ FCC Part 95 Dates of Tests: September 9-10, 2001 Certification © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) 3 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) 3.1 INSERTS Block Diagram(s) & Circuit Diagram(s) The block diagram is shown in Attachment I, and the circuit diagram is shown in Attachment J. Operating Instructions The instruction manual is shown in Attachment K. Test Report S/N: 95.210821520.KNZ FCC Part 95 Dates of Tests: September 9-10, 2001 Certification © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) 4 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) 4.1 DESCRIPTION OF TESTS 4.2 Transmitter A…

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© 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS) © 2001 PCTEST Lab FCC ID: KNZ48521 (Tx/Rx 462.6375MHz) NVLAP Lab Code: 100431-0 DSI (HK) LTD. Wireless Sun Glass Walkie Talkie (FRS)