2AIG5-FS001-UHFUHF Wireless Microphone

FCC warning statement 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. Changes or modifications not expressly approved by the party r esponsible for compliance could void the user's authority to operate the equipment. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. This device operates on a no‐protection, no‐interference basis. Should the user seek to obt ain protection from other radio services operating in the same TV bands, a radio license is required. For further details, consult Innovation, Science and Economic Development Canada’s document Client Procedures Circular CPC‐2‐1‐28, Voluntary Licensing of License‐Exempt Low‐Power Radio Apparatus in the TV Bands.

GuangZhou FirstSound Electronics Co., Ltd. (2020-06-08) MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (UHF Wireless Microphone /FS001-UHF / FCC ID: 2AIG5-FS001-UHF) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Block Diagram/Schematics/Operational Description/BOM/Tune up Procedurer) required to be submitted with this application be permanently withheld from public review. Please contact me if there is any information you may need. Sincerely, Client’s signature : Client’s name / title : CHEN LI / Manager Contact information / address: A5 BUILDING, 19# JIANGSHI ROAD, JIANGGAO GUNAGZHOU,GUANGDONG CHINA

GuangZhou FirstSound Electronics Co., Ltd. (2020-06-08) Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Global United Technology Services 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, Client’s signature : Client’s name / title : CHEN LI / Manager Contact information / address: A5 BUILDING, 19# JIANGSHI ROAD, JIANGGAO GUNAGZHOU,GUANGDONG CHINA

Report No.: GTS202005000201 Global United Technology Services Co., Ltd. No. 301-309, 3/F., Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 30 of 34 9 EUT Constructional Details Report No.: GTS202005000201 Global United Technology Services Co., Ltd. No. 301-309, 3/F., Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 31 of 34 Report No.: GTS202005000201 Global United Technology Services Co., Ltd. No. 301-309, 3/F., Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 32 of 34

4cm Model: FS001-UHF FCC ID: 2AIG5-FS001-UHF 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 causeundesired operation. Label Location 2 cm

Report No.: GTS202005000201 Global United Technology Services Co., Ltd. No. 301-309, 3/F., Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 33 of 34 TX Antenna Report No.: GTS202005000201 Global United Technology Services Co., Ltd. No. 301-309, 3/F., Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 34 of 34 ------End------

FCC ID: 2AIG5-FS001-UHF RF EXPOSURE EVALUATION METHOD SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR,where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID: 2AIG5-FS001-UHF frequency Maximum Peak Conducted Output Power Max Antenna Gain MHz dBm dBi 582.85MHz -2.193 0 588.85MHz 0.717 0  maxpossibleoutputpower(PK,conducted)：0±1dbm 0dBilogarithmictermsconverttonumericresultisnearly1.0. 1dbm=1.26mW 582.85MHz [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]=1.26/5*√0.58285=0.192≤3.0 ThresholdatwhichnoSARrequiredis10mwand≤3.0for1-gSAR,Separation distanceis5mm. 588.85MHz [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]= 1.26/5*√0.58885=0.193≤3.0 ThresholdatwhichnoSARrequiredis10mwand≤3.0for1-gSAR,Separation distanceis5mm.  Conclusion:NoSARisrequired.

FCC TEST REPORT On Behalf of GuangZhou FirstSound Electronics Co., Ltd. UHF Wireless Microphone Model No.: FS001-UHF FCC ID: 2AIG5-FS001-UHF Prepared for : GuangZhou FirstSound Electronics Co., Ltd. Address : A5 Building,19# Jiangshi Road,Jianggao Town,BaiyunDistrict,Guangzhou City,Guangdong, China Prepared By : Shenzhen Alpha Product Testing Co., Ltd. Address : Building i, No.2, Lixin Road, Fuyong Street, Bao'an District, 518103, Shenzhen, Guangdong, China Report Number : A2006251-C01-M01 Date of Receipt : May 20, 2020 Date of Test : May 20, 2020 – June 01, 2020 Date of Report : June 24, 2020 Version Number : V0 Page 2 of 34 Report No.: A2006251-C01-R01 TABLE OF CONTENTS Description Page 1. Summary of Standards And Results.................................................................................. 5 1.1. Description of Standards and Results ......................................................................... 5 2. General Information ........................................................................................................... 6 2.1. Description of Device (EUT) ...................................................................................... 6 2.2. Tested Supporting System Details .............................................................................. 7 2.3. Block Diagram of connection between EUT and simulators ...................................... 7 2.4. Accessories Details ..................................................................................................... 7 2.5. Test Mode Description ................................................................................................ 7 2.6. Test Conditions ........................................................................................................... 8 2.7. Test Facility ................................................................................................................ 8 2.8. Measurement Uncertainty ........................................................................................... 8 2.9. Test Equipment List .................................................................................................... 9 3. Test Results And Measurement Data .............................................................................. 11 3.1. Radiated RF Power Output ....................................................................................... 11 3.2. Frequency Stability ................................................................................................... 13 3.3. Operating bandwidth ................................................................................................. 16 3.4. Radiated Spurious Emission ..................................................................................... 18 3.5. Emission Mask & Necessary bandwidth .................................................................. 21 3.6. Modulation Deviation ............................................................................................... 25 3.7. Audio Frequency Response ...................................................................................... 27 4. Photograph ......................................................................................................................... 29 4.1. Photos of Radiated Emission Test (In Semi Anechoic Chamber) ............................ 29 5. Photos of The EUT ............................................................................................................ 30 Page 3 of 34 Report No.: A2006251-C01-R01 TEST REPORT DECLARATION Applicant : GuangZhou FirstSound Electronics Co., Ltd. Address : A5 Building,19# Jiangshi Road,Jianggao Town,BaiyunDistrict,Guangzhou City,Guangdong, China Manufacturer : GuangZhou FirstSound Electronics Co., Ltd. Address : A5 Building,19# Jiangshi Road,Jianggao Town,BaiyunDistrict,Guangzhou City,Guangdong, China EUT Description : UHF Wireless Microphone (A) Model No. : FS001-UHF (B) Trademark : N/A Measurement Standard Used: FCC Rules and Regulations Part 74 Subpart H, Part 2, ANSI C63.26:2015 The device described above is tested by Shenzhen Alpha Product Testing Co., Ltd. to determine the maximum emission levels emanating from the device and the severe levels of the device can endure and its performance criterion. The test results are contained in this test report and Shenzhen Alpha Product Testing Co., Ltd. is assumed full responsibility for the accuracy and completeness of test. Also, this report shows that the EUT is technically compliant with the FCC Part 74 requirements. This report applies to above tested sample only. This report shall not be reproduced in parts without written approval of Shenzhen Alpha Product Testing Co., Ltd. Tested by (name + signature).............: Reak Yang Project Engineer Approved by (name + signature).......: Simple Guan Project Manager Date of issue..............................: June 24, 2020 Page 4 of 34 Report No.: A2006251-C01-R01 Revision History Revision Issue Date Revisions Revised By V0 June 24, 2020 Initial released Issue Reak Yang Page 5 of 34 Report No.: A2006251-C01-R01 1. SUMMARY OF STANDARDS AND RESULTS 1.1. Description of Standards and Results The EUT have been tested according to the applicable standards as referenced below: Requirement CFR 47 Section Result Radiated RF Power Output §74.861(e) PASS Frequency Stability §74.861(e) PASS Operating bandwidth §74.861(e) PASS Spurious Emissions(Radiated) §74.861(e) PASS Modulation Deviation §74.861(e)(3) PASS Audio Frequency Response FCC 2.1047 (a) PASS Emission Mask & Necessary bandwidth §74.861(e)(6) PASS Note: 1. P is an abbreviation for Pass. 2. F is an abbreviation for Fail. 3. N/A is an abbreviation for Not Applicable. Page 6 of 34 Report No.: A2006251-C01-R01 2. GENERAL INFORMATION 2.1. Description of Device (EUT) Description : UHF Wireless Microphone Model Number : FS001-UHF Diff : N/A Test Voltage : DC 2*1.5V From AA Battery Operation frequency : 582.85MHz, 588.85MH…

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Page 23 of 28 Report No.: A2006251-C01-R01 4. PHOTOGRAPH 4.1. Photos of Radiated Emission Test (In Semi Anechoic Chamber)