2AZ2X655B4Body composition scale

Guangzhou Daxin Health Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2AZ2X655B4 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram, Schematics, Operational Description, Block Diagram Operation Description schematic diagram The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Sincerely, June 29, 2021 minjian Jiang / General Manager Guangzhou Daxin Health Technology Co., Ltd.

Guangzhou Daxin Health Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Date: June 29, 2021 SUBJECT: FCC Application for FCC ID: 2AZ2X655B4 To Whom It May Concern: We, the undersigned, hereby authorize Lisa Wang at EMTEK (SHENZHEN) CO., LTD.on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by EMTEK (SHENZHEN) CO., LTD. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, minjian Jiang / General Manager Guangzhou Daxin Health Technology Co., Ltd.

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FCC ID :2AZ2X655B4 B4 53 Requires Three AAA Batteries Model No.: eF-655B4 SN

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FCC ID: 2AZ2X655B4 Portable device According to §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 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. We use 5mm as separation distance to calculate. Maximum measured transmitter power: Mode Transmit Frequency (GHz) Max Conducted Power (dBm) tune up maximum power(dBm) Result calculation 1-g SAR GFSK 2.48 3.52 4.0 0.8 3 Conclusion: For the max result : 0.8 ≤ 3.0 for 1-g SAR extremity SAR, No SAR is required. Signature: Date: 2021.6.29 NAME AND TITLE (Please print or type): Lisa Wang/Manager COMPANY (Please print or type): Shenzhen EMTEK Co.,Ltd./Building 69, Majialong Industry Zone, Nanshan District, Shenzhen, Guangdong, China

Report No.ES210506018W Page 1 of 42 Ver.1.0 TEST REPORT Product Name ： Body Composition Scale Model Number ： ef-655B4 FCC ID ： 2AZ2X655B4 Prepared for : Guangzhou Daxin Health Technology Co., Ltd. Address : Room 810, No.1, Yichuang Street, Huangpu District, Guangzhou, Guangdong. Prepared by : EMTEK (SHENZHEN) CO., LTD. Address : Bldg 69, Majialong Industry Zone, Nanshan District, Shenzhen, Guangdong, China Tel: (0755) 26954280 Fax: (0755) 26954282 Report Number : ES210506018W Date(s) of Tests : May 29, 2021 to June 03, 2021 Date of issue : June 17, 2021 Report No.ES210506018W Page 2 of 42 Ver.1.0 Table of Contents TEST REPORT ....................................................................................................................................................... 1 1 TEST RESULT CERTIFICATION .............................................................................................................. 3 2 EUT TECHNICAL DESCRIPTION ............................................................................................................. 4 3 SUMMARY OF TEST RESULT ................................................................................................................... 5 4 TEST METHODOLOGY ............................................................................................................................... 6 4.1 GENERAL DESCRIPTION OF APPLIED STANDARDS ....................................................................... 6 4.2 MEASUREMENT EQUIPMENT USED .................................................................................................. 6 4.3 DESCRIPTION OF TEST MODES ........................................................................................................... 7 5 FACILITIES AND ACCREDITATIONS ..................................................................................................... 8 5.1 FACILITIES .............................................................................................................................................. 8 5.2 LABORATORY ACCREDITATIONS AND LISTINGS ......................................................................... 8 6 TEST SYSTEM UNCERTAINTY ................................................................................................................. 9 7 SETUP OF EQUIPMENT UNDER TEST .................................................................................................. 10 7.1 RADIO FREQUENCY TEST SETUP 1 .................................................................................................. 10 7.2 RADIO FREQUENCY TEST SETUP 2 .................................................................................................. 10 7.3 CONDUCTED EMISSION TEST SETUP .............................................................................................. 12 7.4 BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM .............................................................. 13 7.5 SUPPORT EQUIPMENT ........................................................................................................................ 13 8 TEST REQUIREMENTS ............................................................................................................................. 14 8.1 DTS 6DB BANDWIDTH ........................................................................................................................ 14 8.2 MAXIMUM PEAK CONDUCTED OUTPUT POWER ......................................................................... 17 8.3 MAXIMUM POWER SPECTRAL DENSITY ........................................................................................ 20 8.4 UNWANTED EMISSIONS IN NON-RESTRICTED FREQUENCY BANDS ...................................... 23 8.5 RADIATED SPURIOUS EMISSION ...................................................................................................... 28 8.6 CONDUCTED EMISSIONS TEST ......................................................................................................... 40 8.7 ANTENNA APPLICATION ................................................................................................................... 41 Report No.ES210506018W Page 3 of 42 Ver.1.0 1 TEST RESULT CERTIFICATION Applicant : Guangzhou Daxin Health Technology Co., Ltd. Address : Room 810, No.1, Yichuang Street, Huangpu District, Guangzhou, Guangdong. Manufacturer : Guangzhou Daxin Health Technology Co., Ltd. Address : Room 810, No.1, Yichuang Street, Huangpu District, Guangzhou, Guangdong. EUT : Body Composition Scale Model Name : ef-655B4 Trademark : N/A Measurement Procedure Used: APPLICABLE STANDARDS STANDARD TEST RESULT FCC 47 CFR Part 2 , Subpart J FCC 47 CFR Part 15, Subpart C PASS The above equipment was tested by EMTEK(SHENZHEN) CO., LTD. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10 (2013) and the energy emitted by the sample EUT tested as described in this report is in compliance with the requirements of FCC Rules Part 2 and Part 15.247 The test results of this report relate only to the tested sample identified in this report Date of Test : May 29, 2021 to June 03, 2021 Prepared by : Lance Li/Editor Reviewer : Sewen Guo /Supervisor Approve & Authorized Signer : Lisa Wang/Manager Report No.ES210506018W Page 4 of 42 Ver.1.0 2 EUT TECHNICAL DESCRIPTION Product Body Composition Scale Model Number ef-655B4 Sample number: 1# Device Type Bluetooth V4.0 Data Rate : 1Mbps for GFSK modulation Modulation: GFSK Operating Frequency Range: 2402-2480MHz Number of Channels: 40 Channels Transmit Power Max: 3.52 dBm Antenna Type: PCB Antenna Antenna Gain: 2.6 dBi Power supply DC 4.5V( AAA 1.5V*3) Date of Received May 08, 2021 Note: for more details, please refer to the User’s manual of the EUT. Report No.ES210506018W Page 5 of 42 Ver.1.0 3 SUMMARY OF TEST RESULT FCC Part Clause Test Parameter Verdict Remark 15.247(a)(2) DTS (6dB) Bandwidth …

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TEST SETUP PHOTOGRAPHS 1.1. Photos of Radiation Emission Measurement Spurious Emission Test Setup (Below 1GHz) Spurious Emission Test Setup (Above 1GHz)