2A789-TTFM-50ATag

Ningbo Lingzhu Technology CO., Ltd. Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Date: July 31, 2024 Subject: Certifications concerning “covered” equipment pursuant to Part 2.911(d)(5)(i) and (ii) To whom it may concern, Ningbo Lingzhu Technology CO., Ltd. certifies that the equipment FCC ID: 2A789-TTFM-50 for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Ningbo Lingzhu Technology CO., Ltd. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List ( as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, ________________________ Contact Person: Linyun Li E-mail: [email protected]

Rev 2/6/2023 Ningbo Lingzhu Technology CO., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 31/7/2024 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2A789-TTFM-50 Ningbo Lingzhu Technology CO., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, Tuya Smart Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. Ningbo Lingzhu Technology CO., Ltd. accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment and will notify the TCB/FCC in a timely manner if the US Processing Agent changes. Tuya Smart Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: Tuya Smart Inc. Address: 160 Greentree Drive, Suite 101,Dover,DELAWARE,19904 Contact Person: Jingchao Wang Tel.: 818-699-5031 Email: [email protected] Sincerely, [Applicant name] Ningbo Lingzhu Technology CO., Ltd. (Applicant printed name) Linyun Li (Applicant signature) [US Local Agent name] Tuya Smart Inc. US Local Agent FRN number 0034102913 (US Local Agent printed name) Jingchao Wang (US Local Agent signature)

Ningbo Lingzhu Technology CO., Ltd. Date: July 31, 2024 Federal Communications Commission Office of Engineering and Technology Laboratory Division 7435 Oakland Mills Rd Columbia MD 21046-1609 Subject: Request for Confidentiality FCC ID: 2A789-TTFM-50 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission’s rules (47CFR§§0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure indefinitely.  Schematic Diagram  Block Diagram  Operational Description  Tune-up Procedure Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commission’ s policy, in order to comply with the marketing regulations in 47 CFT §2.803 and the importation rules in 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices. We are requesting the commission to grant short-term confidentiality request on the following attachment(s) for 180 days after the grant as outlined in Public Notice DA 04-1705.  External Photos  Internal Photos  Test Setup Photos  User Manual It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Best Regards, ______________________ Contact Person: Linyun Li E-mail: [email protected]

Ningbo Lingzhu Technology CO., Ltd. Date: July 31, 2024 Power of Attorney To whom it may concern, Please be notified that I, Linyun Li, have designated Jim Tsai in Sporton International Inc. as the person being responsible for this project and to sign the form 731 and other documentation. Any and all acts carried out by Jim Tsai in Sporton International Inc., on the matters of relating to all processes required in the FCC approval and any communication needed with the national authority, shall have the same legal authority as acts on our own behalf. We further certifies that neither the applicant nor any party to this application, as defined in 47 CFR Ch. 1.2002 (b), is subject to a denial to Federal benefits, that include FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1998, 21 U.S.C. 835(a). This authorization is limited to the product of as following: FCC ID: 2A789-TTFM-50 If you have any acknowledgement and response, please send it to Sporton International Inc. directly. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely yours, Contact Person: Linyun Li E-mail: [email protected]

Sporton International Inc. (Kunshan) Page Number : 1 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 RF Exposure Evaluation Report APPLICANT : Ningbo Lingzhu Technology CO., Ltd. EQUIPMENT : ATag MODEL NAME : TTFM-50 FCC ID : 2A789-TTFM-50 STANDARD : 47 CFR PART 2.1093 FCC KDB 447498 D01 v06 The product evaluation date was started from Mar. 15, 2024 and completed on Mar. 15, 2024. We, Sporton International Inc. (Kunshan), would like to declare that the device has been evaluated in accordance with 47 CFR Part 2.1093 and FCC KDB 447498 D01 v06, and pass the limit. Without written approval of Sporton International Inc. (Kunshan), the test report shall not be reproduced except in full. Approved by: Si Zhang Sporton International Inc. (Kunshan) No. 1098, Pengxi North Road, Kunshan Economic Development Zone Jiangsu Province 215300 People’s Republic of China Sporton International Inc. (Kunshan) Page Number : 2 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 Table of Contents 1. ADMINISTRATION DATA ........................................................................................................................... 4 1.1. Testing Laboratory ............................................................................................................................. 4 2. DESCRIPTION OF EQUIPMENT UNDER TEST (EUT) ............................................................................. 5 3. MAXIMUM RF TUNE UP POWER AMONG PRODUCTION UNITS .......................................................... 6 4. RF EXPOSURE EVALUATION ................................................................................................................... 6 Sporton International Inc. (Kunshan) Page Number : 3 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 Revision History REPORT NO. VERSION DESCRIPTION ISSUED DATE FA382914 Rev. 01 Initial issue of report Jul. 29, 2024 Sporton International Inc. (Kunshan) Page Number : 4 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 1. Administration Data 1.1. Testing Laboratory Sporton International Inc. (Kunshan) is accredited to ISO/IEC 17025:2017 by American Association for Laboratory Accreditation with Certificate Number 5145.02. Testing Laboratory Test Firm Sporton International Inc. (Kunshan) Test Site Location No. 1098, Pengxi North Road, Kunshan Economic Development Zone Jiangsu Province 215300 People’s Republic of China TEL : +86-512-57900158 Test Site No. Sporton Site No. FCC Designation No. FCC Test Firm Registration No. SAR01-KS CN1257 314309 Applicant Company Name Ningbo Lingzhu Technology CO., Ltd. Address No.578,Building 7,No.535 Kangqiao South Road,Jiangbei District,Ningbo,PRC Manufacturer Company Name Ningbo Lingzhu Technology CO., Ltd. Address No.578,Building 7,No.535 Kangqiao South Road,Jiangbei District,Ningbo,PRC Sporton International Inc. (Kunshan) Page Number : 5 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 2. Description of Equipment Under Test (EUT) Product Feature & Specification EUT Type ATag Model Name TTFM-50 FCC ID 2A789-TTFM-50 Wireless Technology and Frequency Range Bluetooth: 2402 MHz ~ 2480 MHz Mode Bluetooth LE Antenna Type Bluetooth : PCB Antenna Antenna Gain Bluetooth: gain 1.27 dBi HW Version V106 SW Version V1 Remark: 1. The above EUT's information was declared by manufacturer. Please refer to the specifications or user's manual for more detailed description. Comments and Explanations: 1. The declared of product specification for EUT presented in the report are provided by the manufacturer, and the manufacturer takes all the responsibilities for the accuracy of product specification. 2. The maximum RF output tune up power, antenna gain also the safe distance used for evaluate RF exposure were declared by manufacturer. Sporton International Inc. (Kunshan) Page Number : 6 of 6 TEL : +86-512-57900158 Report Issued Date : Jul. 29, 2024 FCC ID : 2A789-TTFM-50 Report Version : Rev. 01 RF Exposure Evaluation Report Report No. : FA382914 3. Maximum RF Tune Up power among production units <Bluetooth> Mode Maximum Average Power (dBm) Bluetooth LE 4.0 4. RF Exposure Evaluation Mode Maximum Average Power (dBm) Bluetooth LE 4.0 Note: 1. Per KDB 447498 D01v06 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  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 Bluetooth Max Power (dBm) Separation Distance (mm) Frequency (GHz) exclusion thresholds 4.0 < 5 2.48 0.8 Conclusion: Per KDB 447498 D01v06, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. The test exclusion threshold is 0.8 which is ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, 1-g SAR and extremity SAR testing is not required, and complied with Specific Absorption Rate (SAR) for general population/uncontrolled exposure limits (1.6 W/kg for 1g SAR and 4.0 W/kg for extremity SAR) specified in FCC 47 CFR part 2 (2.1093). ------THE END------

ANTENNA REPORT Manufacture：TUYA Product Name：TTFM-50 Antenna Antenna Type：PCB Test Date：2023.8.18 Tested by：Caiquan Approved by：Licco Content 1.General Description ................................................................................. 1 2.Test Configurations .................................................................................. 2 2.1 Test Environment ............................................................................ 2 2.2 Test Equipment ............................................................................... 2 2.3 Test Principle................................................................................... 2 3.Test Results .............................................................................................. 3 3.1 Gain and Efficiency.......................................................................... 3 3.2 Radiation Pattern ............................................................................ 4 4.Antenna Dimensions ............................................................................... 6 5.EUT Photo................................................................................................ 7 6.Test Setup Photo ...................................................................................... 8 1 1.General Description Manufacturer Hangzhou Tuya Information Technology Co.,Ltd Address Room 701,Building 3,More Center,No.87 GuDun Road, Hangzhou, Zhejiang,China Test Location Room 106, Building 3, Letong Science Park, No. 500, Qiuyi Road, Binjiang District, Hangzhou Product Name TTFM-50 Antenna Product model TTFM-50 Antenna Antenna Type PCB Antenna Test Items Gain; Efficiency; Radiation Pattern Test Frequency 2400-2500MHz Test Standard ANSI/IEEE Std 149-1979 2 2.Test Configurations 2.1 Test Environment Temperature (°C) 25 Humidity (%RH) 60 Atmospheric Pressure (kPa) 100.5 2.2 Test Equipment Test System TEM 24 Multi-probe Microwave Chamber Test Instrument Agilent E5071B 2.3 Test Principle 3 3.Test Results 3.1 Gain and Efficiency Frequency (MHz) Peak Gain (dBi) Efficiency (%) 2410 0.67 33.88 2420 0.83 38.19 2430 0.98 41.78 2440 1.1 45.92 2450 1.18 49.09 2460 1.23 49.77 2470 1.27 50.58 2480 1.21 48.87 2490 1.19 47.42 2500 0.64 44.46 4 3.2 Radiation Pattern Phi 0 2D Phi 90 2D Theta 90 2D 5 2400MHz 3D 2450MHz 3D 2500MHz 3D 6

Sporton International Inc. (Kunshan) Page Number : 1 of 40 TEL : +86-512-57900158 Report Issued Date : Aug. 13, 2024 FCC ID: 2A789-TTFM-50 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR382914 FCC RF Test Report APPLICANT : Ningbo Lingzhu Technology CO., Ltd. EQUIPMENT : ATag MODEL NAME : TTFM-50 FCC ID : 2A789-TTFM-50 STANDARD : FCC Part 15 Subpart C §15.247 CLASSIFICATION : (DTS) Digital Transmission System TEST DATE(S) : Jul. 01, 2024 ~ Aug. 11, 2024 We, Sporton International Inc. (Kunshan), would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards. The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Kunshan), the test report shall not be reproduced except in full. Approved by: Jason Jia Sporton International Inc. (Kunshan) No. 1098, Pengxi North Road, Kunshan Economic Development Zone Jiangsu Province 215300 People’s Republic of China Sporton International Inc. (Kunshan) Page Number : 2 of 40 TEL : +86-512-57900158 Report Issued Date : Aug. 13, 2024 FCC ID: 2A789-TTFM-50 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR382914 TABLE OF CONTENTS REVISION HISTORY .......................................................................................................................................... 3 SUMMARY OF TEST RESULT ......................................................................................................................... 4 1 GENERAL DESCRIPTION .......................................................................................................................... 5 1.1 Applicant ............................................................................................................................................ 5 1.2 Manufacturer ...................................................................................................................................... 5 1.3 Product Feature of Equipment Under Test ........................................................................................ 5 1.4 Product Specification of Equipment Under Test ................................................................................ 5 1.5 Modification of EUT ........................................................................................................................... 5 1.6 Testing Location ................................................................................................................................ 6 1.7 Test Software ..................................................................................................................................... 6 1.8 Applicable Standards ......................................................................................................................... 6 2 TEST CONFIGURATION OF EQUIPMENT UNDER TEST ........................................................................ 7 2.1 Carrier Frequency Channel ............................................................................................................... 7 2.2 Test Mode .......................................................................................................................................... 8 2.3 Connection Diagram of Test System ................................................................................................. 9 2.4 Support Unit used in test configuration and system .......................................................................... 9 2.5 EUT Operation Test Setup ................................................................................................................ 9 2.6 Measurement Results Explanation Example ..................................................................................... 9 3 TEST RESULT .......................................................................................................................................... 10 3.1 6dB and 99% Bandwidth Measurement .......................................................................................... 10 3.2 Output Power Measurement ............................................................................................................ 17 3.3 Power Spectral Density Measurement ............................................................................................ 18 3.4 Conducted Band Edges and Spurious Emission Measurement ..................................................... 25 3.5 Radiated Band Edges and Spurious Emission Measurement ........................................................ 34 3.6 Antenna Requirements .................................................................................................................... 38 4 LIST OF MEASURING EQUIPMENT ........................................................................................................ 39 5 MEASUREMENT UNCERTAINTY ............................................................................................................ 40 APPENDIX A. CONDUCTED TEST RESULTS APPENDIX B. RADIATED SPURIOUS EMISSION AND PLOTS APPENDIX C. DUTY CYCLE PLOTS APPENDIX D. SETUP PHOTOGRAPHS Sporton International Inc. (Kunshan) Page Number : 3 of 40 TEL : +86-512-57900158 Report Issued Date : Aug. 13, 2024 FCC ID: 2A789-TTFM-50 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR382914 REVISION HISTORY REPORT NO. VERSION DESCRIPTION ISSUED DATE FR382914 Rev. 01 Initial issue of report Aug. 13, 2024 Sporton International Inc. (Kunshan) Page Number : 4 of 40 TEL : +86-512-57900158 Report Issued Date : Aug. 13, 2024 FCC ID: 2A789-TTFM-50 Report Version : Rev. 01 Report Template No.: BU5-FR15CBT4.0 Version 2.0 FCC RF Test Report Report No. : FR382914 SUMMARY OF TEST RESULT Report Section …

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