2BBBT-ST2Smart Watch

Shenzhen Weizhong Xin Technology Co., Ltd 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Shenzhen Weizhong Xin Technology Co., Ltd Address: A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Product Name: Smart Watch FCC ID: 2BBBT-ST2 Model(s): ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6 2.911(d)(5)(i) Equipment Type We, [Shenzhen Weizhong Xin Technology Co., Ltd] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Lin jianwen Date: Jul. 03, 2024 Title: CEO Company name: Shenzhen Weizhong Xin Technology Co., Ltd Signature: NOTE 1 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Shenzhen Weizhong Xin Technology Co., Ltd 2.911 (d)(5)(ii) Applicant Attestation v1.3 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Shenzhen Weizhong Xin Technology Co., Ltd Address: A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Product Name: Smart Watch FCC ID: 2BBBT-ST2 Model(s): ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6 2.911(d)(5)(ii) Applicant filing We, [Shenzhen Weizhong Xin Technology Co., Ltd] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to §1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Lin jianwen Date: Jul. 03, 2024 Title: CEO Company name: Shenzhen Weizhong Xin Technology Co., Ltd Signature: NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List ”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Shenzhen Weizhong Xin Technology Co., Ltd Agent Authorization Company: Shenzhen Weizhong Xin Technology Co., Ltd Address: A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Product Name: Smart Watch Model Number(s): ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6 Product Description: Smart Watch We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Jul. 03, 2024 Name: Lin jianwen Title: CEO Company: Shenzhen Weizhong Xin Technology Co., Ltd

Shenzhen Weizhong Xin Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Jul. 03, 2024 Subject; Request for Confidentiality FCC ID: 2BBBT-ST2 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Lin jianwen Title: CEO

Shenzhen Weizhong Xin Technology Co., Ltd Model Difference Declaration To Whom It May Concern, We, Shenzhen Weizhong Xin Technology Co., Ltd (Smart Watch); Trade Mark: N/A , Model Number: ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6; All model’s the function, software and electric circuit are the same, only with a product color, model named and watchband different. Test sample model: ST2. Please contact me if you have any question. Signature: Date: Jul. 03, 2024 Name: Lin jianwen Title: CEO

FCC ID LABEL: Ca. 4mm x 20mm Label Location FCC ID: 2BBBT‐ST2

FCC RF Exposure EUT Description: Smart Watch Model No.: ST2 FCC ID: 2BBBT-ST2 1. Limits According to KDB 447498 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: Result=P/D*√F F= the RF channel transmit frequency in GHz P= Maximum turn‐up power in mw D= Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power (dBm) Tune Up Power (dBm) Max Tune Up power (dBm/mW) Min test separation distance (mm) ResultLimit (mW/cm 2 ) SAR Test Exclusion 2480 -2.02 -3±1(-2) 0.631 5 0.1993.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2406243308-E, antenna gain=0.17dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.199 which is ≤ 3, RF Exposure testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

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Page 1 of 43 Report No.: HK2406243308-E FCC Test Report Test Report On Behalf of Shenzhen Weizhong Xin Technology Co., Ltd For Smart Watch Model No.: ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6 FCC ID: 2BBBT-ST2 Prepared For: Shenzhen Weizhong Xin Technology Co., Ltd A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Jun. 24, 2024 ~ Jul. 01, 2024 Date of Report: Jul. 01, 2024 Report Number: HK2406243308-E Page 2 of 43 Report No.: HK2406243308-E Test Result Certification Applicant’s Name ................... : Shenzhen Weizhong Xin Technology Co., Ltd Address .................................... : A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Manufacturer's Name ............. : Shenzhen Weizhong Xin Technology Co., Ltd Address .................................... : A415, Building 2, Huaqiang North SEG Science and Technology Park, Futian District, Shenzhen, China Product Description Trade Mark ................................. : N/A Product Name ............................ : Smart Watch Model and/or Type Reference .. : ST2, ST2PRO, ST3, ST3PRO, ST4, ST4PRO, ST5, ST5PRO, ST6 Standards ................................ : 47 CFR FCC Part 15 Subpart C 15.247 KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10: 2013 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology 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. Date of Test .............................................. : Date (s) of Performance of Tests ............... : Jun. 24, 2024 ~ Jul. 01, 2024 Date of Issue ............................................. : Jul. 01, 2024 Test Result ................................................. : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 43 Report No.: HK2406243308-E Contents Page 1 Test Summary ................................................................................................................................................ 5 1.1 Test Description ......................................................................................................................................... 5 1.2 Measurement Uncertainty ......................................................................................................................... 6 1.3 Information of the Test Laboratory ............................................................................................................ 6 2 General Information ....................................................................................................................................... 7 2.1 General Description of EUT ...................................................................................................................... 7 2.2 Description of Test Conditions .................................................................................................................. 9 2.3 Description of Test Setup ........................................................................................................................ 10 2.4 Description of Support Units .................................................................................................................... 11 3 Equipments List for All Test Items ............................................................................................................. 12 4 Test Result .................................................................................................................................................... 13 4.1 Antenna Requirement.............................................................................................................................. 13 4.2 Conduction Emissions Measurement ...................................................................................................... 14 4.3 Radiated Emissions Measurement .......................................................................................................... 18 4.4 Maximum Output Power Measurement ................................................................................................... 27 4.5 Power Spectral Density ........................................................................................................................... 28 4.6 6dB Bandwidth ........................................................................................................................................ 31 4.7 Occupied Bandwidth ................................................................................................................................ 34 4.8 Band Edge ............................................................................................................................................... 35 4.9 Conducted Spurious Emissions .............................................................................................................. 37 5 Test Setup Photos ....................................................................................................................................... 41 6 Photos of the EUT ........................................................................................................................................ 43 Page 4 of 43 Report No.: HK2406243308-E ** Modified History ** Revision Description Issued Data Remark Revision 1.0 Initial Test Report Release Jul. 01, 2024 Jason Zhou Page 5 of 43 Report No.: HK2406243308-E 1 Test Sum…

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Test Model：ST2 Radiated Emission Conducted Emission