2ARN3-WMX-1Dual-Channel Digital Wireless

Shenzhen Jiayz photo industrial ., Ltd Add: A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Tel: 13538005185 Fax: 0755-28435911 Date: 2021-05-18 Dear Sir/Madam, We, Shenzhen Jiayz photo industrial., Ltd Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: FCC ID: 2ARN3-WMX-1 Product name: Dual-Channel Digital Wireless Model no.: BY-WM4 pro, BY-WM4 pro K1,BY-WM4 pro K2, WMX-1,WMX-1 DUO,WMX-1-TX Sincerely, Name/Title： michael zhao/manager Company: Shenzhen Jiayz photo industrial ., Ltd Address: A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Phone: 13538005185 Fax: 0755-28435911 E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: 2021/05/18 TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2ARN3-WMX-1 BY-WM4 pro For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： michael zhao/manager Company: Shenzhen Jiayz photo industrial ., Ltd Address: A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Phone: 13538005185 Fax: 0755-28435911 E-Mail: [email protected]

Shenzhen Jiayz photo industrial ., Ltd A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 5/18/2021 To whom it may concern: We, Shenzhen Jiayz photo industrial., Ltd the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2ARN3-WMX-1 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： michael zhao/manager Company: Shenzhen Jiayz photo industrial ., Ltd Address: A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Phone: 13538005185 Fax: 0755-28435911 E-Mail: [email protected]

FCC ID: 2ARN3-WMX-1 FCC ID: 2ARN3-WMX-1 FCC ID: 2ARN3-WMX-1

FCC ID: 2ARN3-WMX-1 LABEL AND LOCATION Size: L2.5cm*W1.5cm Label And Location Dual-Channel Digital Wireless Model No.: BY-WM4 pro FCC ID: 2ARN3-WMX-1

FCC ID: 2ARN3-WMX-1 FCC ID: 2ARN3-WMX-1

FCC RF Exposure Evaluation FCC ID: 2ARN3-WMX-1 Exposure category: General population/uncontrolled environment EUT Type: Production Unit Device Type: Portable Device Refer Standard: KDB 447498 D01 General RF Exposure Guidance v06 FCC Part 2 §2.1093 Evaluation method According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below 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 according to f) in section 4.1 is applied to determine SAR test exclusion. Conducted Power Results Mode Channel Frequency(MHz) Peak Conducted Output Power (dBm) GFSK 0 2402 -3.325 36 2442 -3.280 72 2477 -3.193 Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 36 Channel 72 Target (dBm) -3.0 -3.0 -3.0 Tolerance ±(dB) 1.0 1.0 1.0 Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power SAR Test Exclusion Threshold SAR Test Exclusion dBm mW GFSK 2.450 5 -2.0 0.631 0.1975 < 3.0 Yes Remark: 1. Output power including tune up tolerance; 2. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test exclusion. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06. ----------------THE END OF REPORT---------------

Shenzhen Global Test Service Co.,Ltd. No.7-101 and 8A-104, Building 7 and 8, DCC Cultural and Creative Garden, No.98, Pingxin North Road, Shangmugu Community, Pinghu Street, Longgang District, Shenzhen, Guangdong FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID. ............................................ : GTS20210510005-1-1 2ARN3-WMX-1 Compiled by ( position+printed name+signature) .. : File administrators Jimmy Wang Supervised by ( position+printed name+signature) .. : Test Engineer Aaron Tan Approved by ( position+printed name+signature) .. : Manager Jason Hu Date of issue ..................................... : May 10, 2021 Representative Laboratory Name .: Shenzhen Global Test Service Co., Ltd. Address ............................................ : No.7-101 and 8A-104, Building 7 and 8, DCC Cultural and Creative Garden, No.98, Pingxin North Road, Shangmugu Community, Pinghu Street, Longgang District, Shenzhen, Guangdong Applicant’s name ............................ : Shenzhen jiayz photo industrial.,ltd Address ............................................ : A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Test specification ...........................: Standard ........................................... : FCC Part 15.247 Shenzhen Global Test Service Co.,Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Global Test Service Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Global Test Service Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description .....................: Dual-Channel Digital Wireless Trade Mark ....................................... : MOVO,BOYA Manufacturer .................................... : Shenzhen jiayz photo industrial.,ltd Model/Type reference....................... : BY-WM4 pro Listed Models .................................. : BY-WM4 pro K1,BY-WM4 pro K2, WMX-1,WMX-1 DUO,WMX-1-TX Modulation ....................................... : GFSK Frequency .......................................... From 2406MHz to 2478MHz Ratings ............................................. : DC 3.0V From Battery Result................................................ : PASS Report No.: GTS20210510005-1-1 Page 2 of 34 T E S T R E P O R T Test Report No. : GTS20210510005-1-1 May 10, 2021 ____________________________________________________________________________________ Date of issue Equipment under Test : Dual-Channel Digital Wireless Model /Type : BY-WM4 pro Listed Models : BY-WM4 pro K1,BY-WM4 pro K2, WMX-1,WMX-1 DUO,WMX-1-TX Applicant : Shenzhen jiayz photo industrial.,ltd Address : A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Manufacturer : Shenzhen jiayz photo industrial.,ltd Address : A16 Builing,Intelligent Terminal Industrial Park of Sililcon Valley Power, Guanlan, Longhua District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: GTS20210510005-1-1 Page 3 of 34 Contents 1 T E S T S T A N D A R D S ................................................................. 4 2 S U M M A R Y ............................................................................ 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 6 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 7 2.8 Modifications 7 3 T E S T E N V I R O N M E N T .............................................................. 8 3.1 Address of the test laboratory 8 3.2 Test Facility 8 3.3 Environmental conditions 8 3.4 Summary of measurement results 9 3.5 Statement of the measurement uncertainty 9 3.6 Equipments Used during the Test 10 4 T E S T C O N D I T I O N S A N D R E S U L T S ........................................... 11 4.1 AC Power Conducted Emission 11 4.2 Radiated Emissions and Band Edge 12 4.3 Maximum Peak Output Power 18 4.4 Power Spectral Density 19 4.5 6dB Bandwidth 21 4.6 Out-of-band Emissions 23 4.7 Antenna Requirement 28 5 T E S T S E T U P P H O T O S O F T H E E U T ......................................... 29 6 P H O T OS O F T H E EUT ........................................................... 30 Report No.: GTS20210510005-1-1 Page 4 of 34 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices KDB558074 D01 V03r05: Guidance for Performing Compliance Measurements on Digital Transmission Systems (DTS) Operating Under §15.247 Report No.: GTS20210510005-1-1 Page 5 of 34 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Apr. 01, 2021 Testing commenced on : Apr. 01, 2021 Testing concluded on : May 10, 2021 2.2 Product Description Product Description: Dual-Channel Digital Wireless Model/Type reference: BY-WM4 pro Power supply: DC 3.00V From Battery Testing sample ID： GTS20210510005-1-1-1# (Engineer sample), GTS20210510005-1-1-2# (Normal sample) GFSK Modulation: GFSK Operation frequency: 2406MHz to 2478MHz Channel number: 73 Channel separation: 1 MHz Antenna type: PCB antenna Antenna gain: 0.00 dBi 2.3 Equipment Under Test Power supply system utilised Power supply voltage : ○ 230V / 50 Hz ○ 120V / 60Hz ○ 12 V DC ○ 24 V DC ● Other (specified in blank below) DC 3.00V Fro…

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FCC ID: 2ARN3-WMX-1 Radiated Emissions