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TECH-AUDIO CO., LTD Agent Authorization Letter 2020-04-13 MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Huaxia Testing Technology Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Name: Xiaoping Zeng Position: Manager Company Name: TECH-AUDIO CO., LTD Address: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Tel / Fax +86-592-7231502/ +86-592-6023178 E-Mail: [email protected]

Model difference letter 2020,04,13 Dear MET Reviewer, This is a new Application from TECH-AUDIO CO., LTD FS-S65, FS-S8 are identical in interior structure, electrical circuits, components. Only different in the shape of the faceplate and model name. Thank you for your cooperation! Yours sincerely, Signatory: Name: Xiaoping Zeng Position: Manager Company Name: TECH-AUDIO CO., LTD Address: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Tel / Fax +86-592-7231502/ +86-592-6023178 E-Mail: [email protected]

FCC ID: 2AABM-FSS65 Test Model No.:FS-S65 FCC ID: 2AABM-FSS65 FCC ID: 2AABM-FSS65 FCC ID: 2AABM-FSS65



 
    
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FCC ID: 2AABM-FSS65 Test Model No.:FS-S65

FCC ID: 2AABM-FSS65 FCC ID: 2AABM-FSS65 FCC ID: 2AABM-FSS65 FCC ID: 2AABM-FSS65

Shenzhen Huaxia Testing Technology Co., Ltd 1F., Block A of Tongsheng Technology Building, Huahui Road, Dalang Street, Longhua District, Shenzhen, China Telephone: +86-755-26648640 Fax: +86-755-26648637 Website: www.cqa-cert.com Report Template Version: V04 Report Template Revision Date: 2018-07-06 RF Exposure Evaluation Report The test report is effective only with both signature and specialized stamp, The result(s) shown in this report refer only to the sample(s) tested. Without written approval of CQA, this report can’t be reproduced except in full. Report No. : CQASZ20200100002E-02 Applicant: TECH-AUDIO CO., LTD Address of Applicant: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Equipment Under Test (EUT): Product: Compact Powered Wired/Wireless Subwoofers Model No.: FS-S65, FS-S8 Test Model No.: FS-S65 Brand Name: N/A FCC ID: 2AABM-FSS65S8 Standards: 47 CFR Part 1.1307 47 CFR Part 2.1093 KDB447498D01 General RF Exposure Guidance v06 Date of Receipt: 2020-03-14 Date of Test: 2020-03-14 to 2020-04-08 Date of Issue: 2020-04-08 Test Result : PASS* *In the configuration tested, the EUT complied with the standards specified above Tested By： (Tom Chen) Reviewed By: (Sheek Luo) Approved By: (Jack Ai) Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-02 Page:2 of 6 1 Version Revision History Of Report Report No. Version Description Issue Date CQASZ20200100002E-02 Rev.01 Initial report 2020-04-08 Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-02 Page:3 of 6 2 Contents Page 1 VERSION .....................................................................................................................................................................2 2 CONTENTS .................................................................................................................................................................3 3 GENERAL INFORMATION .......................................................................................................................................4 3.1 CLIENT INFORMATION ................................................................................................................................................4 3.2 GENERAL DESCRIPTION OF EUT ................................................................................................................................4 4 RF EXPOSURE EVALUATION ................................................................................................................................5 4.1 RF EXPOSURE COMPLIANCE REQUIREMENT ..............................................................................................................5 4.1.1 Limits ..............................................................................................................................................................5 4.1.2 Test Procedure ..............................................................................................................................................5 4.2 1.1.3 EUT RF EXPOSURE EVALUATION ....................................................................................................................6 Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-02 Page:4 of 6 3 General Information 3.1 Client Information Applicant: TECH-AUDIO CO., LTD Address of Applicant: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Manufacturer: Atlantic Technology Address of Manufacturer: 343 Vanderbilt Avenue, Norwood, MA 02062-5060 3.2 General Description of EUT Product Name: Compact Powered Wired/Wireless Subwoofers Model No.: FS-S65, FS-S8 Test Model No.: FS-S65 Trade Mark: N/A Hardware Version: REV1.0 . Software Version: skaa-rx-TechAudio_JE0715-develop-v2.4.1-dev-1744-gd4f3f944-untested.tcf Operation Frequency: 2403.5MHz~2477.3MHz Modulation Technique: Frequency Hopping Spread Spectrum(FHSS) Modulation Type: FSK Transfer Rate: 1Mbps BW: 2.5MHz Number of Channel: 49 Hopping Channel Type: Adaptive Frequency Hopping systems Sample Type: Mobile Portable Fix Location Test Software of EUT: Antenna Type: SKAA (manufacturer declare ) PCB Interior Antenna Antenna Gain: 3.3dBi Power Supply: 120V/60Hz Model No.: FS-S65, FS-S8 Only the model FS-S65 was tested, since the electrical circuit design, layout, components used and internal wiring were identical for the above models, with difference being color of appearance and model name. Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-02 Page:5 of 6 4 RF Exposure Evaluation 4.1 RF Exposure Compliance Requirement 4.1.1 Limits According to FCC Part1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in part1.1307(b) F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4* Pi * R 2 ) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. 4.1.2 Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-02 Page:6 of 6 4.2 1.1.3 EUT RF Exposure Evaluation For 5G WIFI Antenna Gain: 3.3dBi Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.14 in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: Measurement Data FSK mode Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) (mW) Lowest(2403.5MHz) 15.290 14.5±1.0 15.5 35.481 Middle(2440.4MHz) 15.080 14.5±1.0 15.5 35.481 Highest(2477.3MHz) 14.900 14.0±1.0 15.…

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Shenzhen Huaxia Testing Technology Co., Ltd 1F., Block A of Tongsheng Technology Building, Huahui Road, Dalang Street, Longhua District, Shenzhen, China Telephone: +86-755-26648640 Fax: +86-755-26648637 Website: www.cqa-cert.com Report Template Version: V04 Report Template Revision Date: 2018-07-06 Test Report The test report is effective only with both signature and specialized stamp, The result(s) shown in this report refer only to the sample(s) tested. Without written approval of CQA, this report can’t be reproduced except in full. Report No. : CQASZ20200100002E-01 Applicant: TECH-AUDIO CO., LTD Address of Applicant: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Equipment Under Test (EUT): Product: Compact Powered Wired/Wireless Subwoofers Model No.: FS-S65, FS-S8 Test Model No.: FS-S65 Brand Name: N/A FCC ID: 2AABM-FSS65S8 Standards: 47 CFR Part 15, Subpart C Date of Receipt: 2020-03-14 Date of Test: 2020-03-14 to 2020-04-08 Date of Issue: 2020-04-08 Test Result : PASS* *In the configuration tested, the EUT complied with the standards specified above Tested By： (Tom Chen) Reviewed By: (Sheek Luo) Approved By: (Jack Ai) Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-01 Page:2 of 60 1 Version Revision History Of Report Report No. Version Description Issue Date CQASZ20200100002E-01 Rev.01 Initial report 2020-04-08 Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-01 Page:3 of 60 2 Test Summary Test Item Test Requirement Test method Result Antenna Requirement 47 CFR Part 15, Subpart C Section 15.203/15.247 (c) ANSI C63.10 (2013) PASS AC Power Line Conducted Emission 47 CFR Part 15, Subpart C Section 15.207 ANSI C63.10 (2013) PASS Conducted Peak Output Power 47 CFR Part 15, Subpart C Section 15.247 (b)(1) ANSI C63.10 (2013) PASS 20dB Occupied Bandwidth 47 CFR Part 15, Subpart C Section 15.247 (a)(1) ANSI C63.10 (2013) PASS Carrier Frequencies Separation 47 CFR Part 15, Subpart C Section 15.247 (a)(1) ANSI C63.10 (2013) PASS Hopping Channel Number 47 CFR Part 15, Subpart C Section 15.247 (a)(1) ANSI C63.10 (2013) PASS Dwell Time 47 CFR Part 15, Subpart C Section 15.247 (a)(1) ANSI C63.10 (2013) PASS Pseudorandom Frequency Hopping Sequence 47 CFR Part 15, Subpart C Section 15.247(b)(4)&TCB Exclusion List (7 July 2002) ANSI C63.10 (2013) PASS Band-edge for RF Conducted Emissions 47 CFR Part 15, Subpart C Section 15.247(d) ANSI C63.10 (2013) PASS RF Conducted Spurious Emissions 47 CFR Part 15, Subpart C Section 15.247(d) ANSI C63.10 (2013) PASS Radiated Spurious emissions 47 CFR Part 15, Subpart C Section 15.205/15.209 ANSI C63.10 (2013) PASS Restricted bands around fundamental frequency (Radiated Emission) 47 CFR Part 15, Subpart C Section 15.205/15.209 ANSI C63.10 (2013) PASS Model No.: FS-S65, FS-S8 Only the model FS-S65 was tested, since the electrical circuit design, layout, components used and internal wiring were identical for the above models, with difference being color of appearance and model name. Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20200100002E-01 Page:4 of 60 3 Contents Page 1 VERSION .................................................................................................................................................................. 2 2 TEST SUMMARY .................................................................................................................................................... 3 3 CONTENTS .............................................................................................................................................................. 4 4 GENERAL INFORMATION ................................................................................................................................... 5 4.1 CLIENT INFORMATION .......................................................................................................................................... 5 4.2 GENERAL DESCRIPTION OF EUT .......................................................................................................................... 5 4.3 ADDITIONAL INSTRUCTIONS................................................................................................................................. 7 4.4 TEST ENVIRONMENT ............................................................................................................................................ 7 4.5 DESCRIPTION OF SUPPORT UNITS ......................................................................................................................... 7 4.6 STATEMENT OF THE MEASUREMENT UNCERTAINTY ............................................................................................. 8 4.7 TEST LOCATION ................................................................................................................................................... 9 4.8 TEST FACILITY ..................................................................................................................................................... 9 4.9 ABNORMALITIES FROM STANDARD CONDITIONS ................................................................................................. 9 4.10 OTHER INFORMATION REQUESTED BY THE CUSTOMER ........................................................................................ 9 4.11 EQUIPMENT LIST ................................................................................................................................................ 10 5 TEST RESULTS AND MEASUREMENT DATA .............................................................................................. 11 5.1 ANTENNA REQUIREMENT ................................................................................................................................... 11 5.2 CONDUCTED EMISSIONS ..................................................................................................................................... 12 5.3 CONDUCTED PEAK OUTPUT POWER…

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FCC ID: 2AABM-FSS65 1 Photographs - EUT Test Setup 1.1 Radiated Emission 9KHz~30MHz: 30MHz~1GHz: FCC ID: 2AABM-FSS65 Above 1GHz: 1.2 Conducted Emission