WY3CEW182RXIN-POOL SPEAKER-RECEIVER

DMD Holdings Limited Mezz Floor, Wah Wai Industrial Centre, 38-42 Au Pui Wan Street, Fo Tan, N.T., Hong Kong. Tel: (852) 3118-6969 Fax: (852) 2542-4533 Website: www.dmdholdings.com Date : 9 SEP 2010 GTC Centre Limited Flat 02, 15/F., Fonda Industrial Building, 37-39 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong Attn.: Mr. CS Lin Dear Sir, Re : Letter of Request for Application of FCC ID: WY3CEW182RX This is the letter of request GTC Centre Limited (Mr. CS Lin) to apply on our behalf for the FCC Applicant/Grantee Code for DMD Holdings Limited, Shop 4, G/F, Wah Wai Ind Centre, 38-40 Au Pui Wan St, Fo Tan, N.T., Hong Kong. Thank you for your kind co-operation. We look forward to receiving your reply soon. Yours sincerely, Printed Name: Anthony, K.W. HO Signature with Company Chop

FCC ID: WY3CEW182RX MADE IN CHINA This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 11 of 14 Photos of EUT Component Side View REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 12 of 14 Component Side View Copper Side View REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 13 of 14 Copper Side View

Receiver 1. 2.5V voltage regulator A voltage supplier regulator is applied to provide a 2.5V voltage for the local oscillator, and FM demodulation. 2. 6V battery The whole system is powered by a 6V battery. 3. 49.86MHz local oscillator A crystal oscillator is applied to generate a 49.86MHz Local Osclation frequency for the FM demodulation for direct down conversion. The system is powered by the 2.5V output from the 2.5V voltage regulator block. 4. FM demodulation The FM demodulation is performed by direct conversion with a the local oscillation signal of 49.86 Mhz generated from the local oscillator block. The converted signal is a 70kHz IF signal which will be amplified by an IF amplifier. The IF signal will be FM demodulated and the audio signal will be detected from the demodulated signal. 5. RF input The RF signal is picked up by a quarter-wave antenna and will pass through an antenna matching network before being amplified by a LNA. The amplified RF signal is then input to the FM demodulation block to generate the embedded audio signal from the RF signal. 6. Electronic volume The audio signal generated from the FM demodulation block will be input to the electronic volume block, which is a digital controlled voltage divider block. As a result, the output of the electronic volume control block will have the amplitude scaled appropriately to achieve the volume control function. 7. Audio power amplifier A 3W power amplifier is applied to amplify the audio signal obtained from the electronic volume control block. The output of the 3W power amplifier is connected to a 4ohm speaker to generate the audible signal.

123456 A B C D 6 54321 D C B A Title NumberRevisionSize B Date:11-Nov-2009Sheet of File:F:\电子E\49MHZ\49MHZ-RX-SCH(入实验室).DDBDrawn By: L 1 L1=14T 3.5MM 0.4MM C2 50PF C4 120PF A1 ANTENNA C 5 1 0 N F C21 0.47UF C22 0.1UF C24 4 . 7 N F R10 10K G N D 3 IN 1 OUT 2 U4 2.5V VCC C23 10UF C25 22NF C26 470PF C9 330pF C8 0.1UF C7 3.9NF C1 3.3NF C6 180PF 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 U2 SC9235 + C14 470UF R6 1K+ C15 470UF D3 4148 D1 4148 VCC R1 10K R3 10K C12 100UF C28 10UF C27 2.2UF R 1 1 3 3 K C13 0.1UF C11 1500PF R 4 3 . 9 K R 5 8 . 2 K C10 1UF C16 1UF 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 U3 CM7D2025 R7 3.3K R 8 5 . 6 K / 3 . 3 K + C18 100UF + C32 100UF C33 0.47UF + C19 100UF + C29 100UF C30 0.47UF 49MHZ-RX 49MHZRX091105 R12 4.7K + C35 100UF C36 0.1UF C39 3.9nf + C40 470UF R9 56K T1 0.56UH 3:1 C42 0.1UF Q1 9018 R13 15K C43 SHORT R14 56K Y1 49.79MHZ C45 47PF C3 1nf C46 30PF L2 L2=14T 3.5MM 0.4MM Q2 9018 R15 1K C47 22nf R48 100K C49 1NF C44 2.2UF R16 100K R 1 7 1 0 K C48 2.2NF C50 30pf REMARK:3W R8=5.6K REMARK:1W R8=3.3K C51 100NF SP SP 6V 1 2 3 J1 UP/DN UP DN 6V 2.5V 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 U1 CMW4988 2.5V 2.5V 2.5V PDF created with pdfFactory trial version www.pdffactory.com

FCC TEST REPORT Application No.: 10052850 (49MHz,Rx) Rm02, 15/F Fonda Ind Bldg, 37-39 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong Tel: [852] 2690 0881 Fax: [852] 2690 0877 REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 2 of 14 TABLE OF CONTENTS Cover Sheet --------------------------- p.1 Table of Contents --------------------------- p.2 General Details --------------------------- p.3 ~ p.4 Summary of Test Results --------------------------- p.5 Radiation Emission Test --------------------------- p.6 ~ p.7 Conducted Emission Test --------------------------- p.8 Appendix A List of Measurement Equipment --------------------------- p.9 Appendix B Test Sample & Setup (Photo) --------------------------- p.10 ~ p.14 REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 3 of 14 APPLICANT: DMD Holdings Ltd ADDRESS: (MEZZ),shop 4, G/F Wah Wai Ind Ctr, 38-40 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong DATE OF RECEIVED: 25 June, 2010 DATE OF TESTING: 25 June 2010 to 15 July,2010 DESCRIPTION OF SAMPLE: Product: In-Pool Speaker Brand Name: NIL Model No.: CEW 182 FCC ID: WY3CEW182RX Input Voltage: DC6V (C size x 4) Description of EUT Operation The Equipment Under Test (EUT) is a DMD Hodings Limited, Inpool Speaker. INVESTIGATION REQUESTED: FCC PART 15 SUBPART B TEST RESULTS: See attached sheets CONCLUSIONS: The submitted product COMPLIED with the requirements of Federal Communications Commission [FCC] Rules and Regulations Part 15. The tests were performed in accordance with the standards described above and on page 5 in this Test report. CS Lin, (EMC Manager) for Chief Executive REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 4 of 14 General Details Test Laboratory GTC CENTRE LTD EMC Laboratory Rm02, 15/F Fonda Ind Bldg, 37-39 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong Telephone: Fax: 852 2690 0881 852 2690 0877 Applicant Details Applicant DMD Holdings Ltd MEZZ),shop 4, G/F Wah Wai Ind Ctr, 38-40 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong Manufacturer DMD Holdings Ltd MEZZ),shop 4, G/F Wah Wai Ind Ctr, 38-40 Au Pui Wan Street, Fotan Shatin, N.T., Hong Kong REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 5 of 14 Technical Details Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:2003 for FCC Certification. Test Standards and Results Summary Tables EMISSION Results Summary Test Result Test Condition Test Requirement Test Method Pass Failed N/A Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.109 (Class B) ANSI C63.4:2003 Conducted Emissions on AC, 0.15MHz to 30MHz FCC 47CFR 15.107 (Class B) ANSI C63.4:2003 Note: N/A – Not Applicable REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 6 of 14 Test Results Emission Radiation Emission Measurement (30MHz to 1GHz) Setup diagram: Test Method: The sample was placed 0.8m above the ground plane on the OATS*. Measurements in both horizontal and vertical polarities were performed. During the test, each emission was maximized by: having the EUT continuously working, investigated all operating modes, rotated about all 3 axis (X,Y & Z) and considered typical configuration to obtain worst position, manipulating interconnecting cables, rotating turntable, varying antenna height from 1m to 4m in both horizontal and vertical polarizations. The emissions worst-case are shown in Test Results of the following pages. *. OATS [Open Area Test Site] located at GTC with a metal ground plane filed with the FCC pursuant to section 2.948 of the FCC rules. With Registration Number:493655 EUT Computer Test Receiver Printer out 3 Meter Cable Data Transmission Ground Plane Turn Table REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 7 of 14 Radiation Emissions Measurement Appl. : DMD Holdings Limited Model: CEW182 Operation: RX mode Tested By: Man Yip (EMC Engineer) Test Requirement: FCC 47CFR 15.109 Level: Class B Test Method: ANSI C63.4:2003 Test Date: 2010-07-14 Limits for Radiated Emissions: Frequency Range Quasi-Peak Limits [MHz] [μV/m] 30-88 100 88-216 150 216-960 200 Above960 500 The emission limits shown in the above table are based on measurement employing a CISPR quasi-peak detector and above 1000MHz are based on measurements employing an average detector. Radiated Emissions Quasi-Peak Frequency Measured Level @3m Correction Factor Field Strength Field Strength Limit @3m E-Field Polarity MHz dBμV dB/m dBμV/m μV/m μV/m 54.4 < 18.0 10.2 <28.2 <257. 100 Horizontal 93.0 < 18.0 9.3 <27.3 <23.2 150 Horizontal 139.0 < 18.0 14.5 <32.5 <42.2 150 Horizontal 300.0 < 18.0 16.6 <34.6 <53.7 200 Horizontal 500.0 < 18.0 20.1 <38.1 <80.4 200 Horizontal 1000.0 < 18.0 27.8 <45.8 <195.0 500 Horizontal Remark: Calculated measurement uncertainty : 30MHz to 1GHz ±4.1dB REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 8 of 14 Conducted Emission on AC (0.15MHz to 30MHz) Appl. : DMD Hildings Limited Model: CEW182 Operation: N/A Tested By: Man Yip (EMC Engineer) Test Requirement: FCC 47CFR 15.107 Level: Class B Test Method: ANSI C63.4:2003 Test Date: N/A Results: N/A The EUT is operated by a single source of internal battery power [located in the battery compartment], therefore power line conducted emission was deemed unnecessary. REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 9 of 14 APPENDIX A LIST OF MEASUREMENT EQUIPMENT Equi. No. Equipment Manufacturer Model No.Serial No. Calibration Date Due Date E005 EMI Test Receiver Rohde & Schwarz ESVP 893417/019 09 Sep 2009 08 Sep 2010 E003 Spectrum Analyzer With Q/P Tektronix 2712 B034039 09 Sep 2009 08 Sep 2010 E004 RF Preselector Tektronix 2706 B010649 09 Sep 2009 08 Sep 2010 E057 EMI Test Receiver Rohde & Schwarz ESV 863112/007 17 Aug 2010 16 Aug 2011 E084 Spectrum Analyzer Hewlett Packard HP 8568B 3001A04930 07 Jul 2010 06 Jul 2011 E085 Displayer of Spectrum Analyzer Hewlett Packard HP 85662A2033A01841 07 Sep 2009 06 Sep 2010 E086 Quasi-Peak Adaptor Hewlett Packard HP 85650A2527A00785 07 Sep 2009 06 Sep 2010…

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REPORT NO.: 10052850(RX) DATE: 12 August, 2010 Page 14 of 14 Photos of EUT Measurement of Radiated Emission Test Set up End of Document