WY3CEW182TXIN-POOL SPEAKER-TRANSMITTER

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: WY3CEW182TX 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

REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 16 of 20 APPENDIX C Photos of EUT

FCC ID: WY3CEW182TX 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 (Tx) DATE: 19 July, 2010 Page 17 of 20 Photos of EUT Component Side View REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 18 of 20 Photos of EUT Component Copper View

Transmitter The FM transmitter system works with a reliable and stable crystal based PLL RF signal generator. The aud signal is directly feed into the PLL RF signal generator after appropriate level shift to ensure the modulation range will be +/-60kHz modulated signal for a 1kHz 2Vpp sinusoidal input signal. The output of the PLL RF signal generator is therefore a 49.86MHz FM signal ready to be transmitted. Before the RF signal is being transmitted to the space through a quarter-wave antenna, the RF signal is first amplified by a 2-stage RF amplifier in order to generate a 4dBm output when the battery level drops to 3.3V. Actually the system has build-in low battery detector, such that when the battery level is low, the power will be cut off from the system to enter power down mode. By doing so will ensure the system has enough power to maintain the carrier frequency of the FM signal to be 49.86MHz. The amplified RF signal is then filtered with EMI filter and connected to the antenna through an antenna matching network.

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-TX-SCH(入实验室).DDBDrawn By: L3 0.47UH Q1 9018 R1 33K R2 10 6V 6V C11NF C5 56P C6 82P C7 56P C4 1NF L5 270NH L6 270NH E1 ANTENNA 49MHZ TX-RF AMP 49-RF AMP090327 C16 NIL(10NF) C15 1UF + C13 NIL(100UF/10V)C11 NIL(10NF) C10 1UF + C8 NIL(100UF/10V) + C17 100UF/10V C18 0.1UF C19 NIL(1UF) C21 0.1UF 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 U1 CM4902 C26 0.47UF R7 1.8K R6 1.8K C23 0.47UF C25 10UF C24 NIL(330PF) R5 10K R8 10K R9 10K R13 1.5K C22 1UF C27 2PF L 7 5 6 0 N H C28 27PF R10 22 D2 B B 2 0 2 IN AUDIO IN AUDIO RF OUT Q3 9012 R14 10K R12 15K R11 5.1K C31 1UF VDD VDD VDD VDD Y1 4.3012MHZ C29 2PF C30 2PF C 3 2 1 8 p f C33 nil R15 100K C36 NIL(10NF) C37 (10UF) R16 56k G N D 3 IN 1 OUT 2 U2 CM7R6206-3.3V C9 10NF C20 100UF/10V C2 1NF Q2 9018 R3 10K L1 10UH L2 0.47UH C3 22PF C12 3.3NF C39 82PFC38 56PF C40 56PF L8 270NH L9 270NH C41 1NF PDF created with pdfFactory trial version www.pdffactory.com

FCC TEST REPORT Application No.: 10052850 (49MHz, Tx) 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 (Tx) DATE: 19 July, 2010 Page 2 of 20 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.8 Conducted Emission Test --------------------------- p.9 ~ p.10 Bandwidth Measurement --------------------------- p.11 ~ p.12 Appendix A List of Measurement Equipment --------------------------- p.13 Appendix B Duty Cycle correction During 100msec --------------------------- p.14~ p.15 Appendix C Test Sample & Setup (Photos) --------------------------- p.16 ~ p.20 REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 3 of 20 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: WY3CEW182TX Input Voltage: DC6V (3A x 4) Description of EUT Operation The Equipment Under Test (EUT) is a DMD Hodings Limited, Inpool Speaker. INVESTIGATION REQUESTED: FCC PART 15 SUBPART C 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 Test report. CS Lin, (EMC Manager) for Chief Executive REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 4 of 20 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 2699 0881 852 2699 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 (Tx) DATE: 19 July, 2010 Page 5 of 20 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 Field Strength of Fundamental Emissions & Spurious Emissions FCC 47CFR 15.235 ANSI C63.4:2003 Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.209 ANSI C63.4:2003 Conducted Emissions on AC, 0.15MHz to 30MHz FCC 47CFR 15.207 ANSI C63.4:2003 Note: N/A – Not Applicable REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 6 of 20 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 (Tx) DATE: 19 July, 2010 Page 7 of 20 Radiation Emissions Measurement Appl. : DMD Holdings Limited Model: CEW 182 Operation: TX mode connect with MP3 player -MP3 player with 2/3 volume (sound music) Tested By: Man Yip (EMC Engineer) Test Requirement: FCC 47CFR 15.235 Test Method: ANSI C63.4:2003 Limits for Field Strength of Fundamental Emissions : Frequency Range of Fundamental Field Strength of Fundamental Emission Field Strength of Fundamental Emission [Peak] [Average] [MHz] [μV/m] [μV/m] 49.82-49.90 100,000 10,000 Results: Field Strength of Fundamental Emissions Peak Value Frequency Measured Level @3m Correction FactorField StrengthField StrengthLimit @3m E-Field Polarity MHz dBμV dB/m dBμV/m μV/m μV/m 49.86 62.5 11.7 74.2 5,128.6 100,000 Horizontal Field Strength of Fundamental Emissions Average Frequency Adjusted by Duty Cycle Field StrengthField StrengthLimit @3m E-Field Polarity MHz dB dBμV/m μV/m μV/m 49.86 -7.9 60.2 1,023.3 10,000 Horizontal According to FCC 47CFR 15.35, the limit on the radio frequency emissions as measured using instrumentation with a peak detector function, corresponding to 20dB above the maximum permitted average limit for the frequency being investigated unless a different peak emission limit is otherwise specified in the rules. Remarks: Correction Factor included Antenna Factor and Cable Attenuation. Calculated measurement uncertainty : 30MHz to 1GHz ±4.1dB REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 8 of 20 Radiation Emissions Measurement Appl. : DMD HoldingsLimited Model: CEW182 Operation: TX mode connect with MP3 player -MP3 player with 2/3 volume (sound music) Tested By: Man Yip (EMC Engineer) Test Requirement: FCC 47CFR 15.209 Test Method: ANSI C63.4:2003 Results: 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…

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REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 19 of 20 Photos of EUT Measurement of Radiated Emission Test Set up REPORT NO.: 10052850 (Tx) DATE: 19 July, 2010 Page 20 of 20 Line Conduct End of Document