2BFOY-TAGDLocatorPro

* the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 9/1/2025 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BFOY-TAGD FRN of applicant: 0035222447 Per section 2.911(d)(7) of the FCC rules, [Shenzhen Siindoo Acoustics Technology Co.,Ltd] (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Global Product Services and Consultation LLC FCC Registration Number (FRN): 0033406703 Physical U.S. Company Address: 328 W Palm Ave., Monrovia, CA 91016, United States Contact Person: Michael Chan Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant 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. Applicant Signed:Agent Signed (if different from Applicant): Signed: Printed name: Libin Lin Title: Head of Certification Company Name: Shenzhen Siindoo Acoustics Technology Co.,Ltd Address: Room D403, No.10th, Huanguan South Road, Junzibu Community, Guanlan Street, Longhua District, Shenzhen, China Signed: Printed name: Mr Michael Chan Title: Technical Director Company Name: Global Product Services and Consultation LLC Date: 9/1/2025 Date: 8/26/2025 SC5089044

Shenzhen Siindoo Acoustics Technology Co.,Ltd 2025-08-26 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2BFOY-TAGD) [Shenzhen Siindoo Acoustics Technology Co.,Ltd] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, Libin Lin Head of Certification Shenzhen Siindoo Acoustics Technology Co.,Ltd Room D403, No.10th,Huanguan South Road,Junzibu Community ,Guanlan Street, Longhua District, Shenzhen, China Shenzhen Siindoo Acoustics Technology Co.,Ltd 2025-08-26 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2BFOY-TAGD) [Shenzhen Siindoo Acoustics Technology Co.,Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, Libin Lin Head of Certification Shenzhen Siindoo Acoustics Technology Co.,Ltd Room D403, No.10th,Huanguan South Road,Junzibu Community ,Guanlan Street, Longhua District, Shenzhen, China

External

Material: silk-screen

Internal Antenna ntenna

RF EXPOSURE EVALUATION EUT Specification EUT LocatorPro Model Number TAG D FCC ID 2BFOY-TAGD Antenna gain (Max) -2.31dBi Operation Frequency 2402-2480MHz Power Supply 3Vdc Classification Per Stipulated Test Standard §15.247(i), §2.1093 Modulation GFSK Max. output power -2.04dBm (0.6252mW) Test Requirement: 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. Routine SAR evaluation refers to that specifically required by §2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to quality for TCB approval. One antenna is available for the EUT. The minimum separation distance is 5mm. BLE: Transmit Frequency (MHz) Mode Measured Power (dBm) Tune up Power (dBm) Max tune up power(dBm) Calculation Result 1-g SAR 2402 GFSK（2M） -2.04 -2±1 -1 0.24621 3 2440 GFSK（2M） -2.07 -2±1 -1 0.24815 3 2480 GFSK（2M） -2.17 -2±1 -1 0.25017 3 According to KDB 447498, no stand-alone required for BT antenna, and no simultaneous SAR measurement is required. Signature: Shawn Wen Date: 2025-08-25

Antennatestreport 1. 规格 EUT Name CBU Antenna Wireless type BLE Antenna Type PCB antenna Dimensions Appendix A 2. TechnicalInformation Frequency Range 2402MHz~2480MHz Test Frequency 2400,2410......2500MHz 3. Appendix AAntenna Dimension 4. Appendix C Gain and Efficiency 5. AppendixDRadiationPattern

TRF No.: 04-E001-0B TRF Originator: GTG TRF Date: 2023-12-13 Web: www.gtggroup.com E-mail: [email protected] Tel.: 86-400 755 8988 CFR 47 FCC PART 15 SUBPART C(DTS) TEST REPORT For LocatorPro MODEL NUMBER: TAG D REPORT NUMBER: E04A25080328F00201 ISSUE DATE: August 22, 2025 FCC ID: 2BFOY-TAGD Prepared for Shenzhen Siindoo Acoustics Technology Co.,Ltd Room D403, No.10th, Huanguan South Road, Junzibu Community, Guanlan Street, Longhua District, Shenzhen, China Prepared by Guangdong Global Testing Technology Co., Ltd. Room 101-105, 203-210, Building 1, No.2, Keji 8 Road, Songshan Lake Park, Dongguan city, Guangdong, People’s Republic of China, 523808 This report is based on a single evaluation of the submitted sample(s) of the above mentioned product, it does not imply an assessment of the production of the products. This report shall not be reproduced, except in full, without the written approval of Guangdong Global Testing Technology Co., Ltd. REPORT NO.: E04A25080328F00201 Page 2 of 61 TRF No.: 04-E001-0B Global Testing , Great Quality. Revision History Rev. Issue Date Revisions Revised By V0 August 22, 2025 Initial Issue REPORT NO.: E04A25080328F00201 Page 3 of 61 TRF No.: 04-E001-0B Global Testing , Great Quality. Summary of Test Results Test Item Clause Limit/Requirement Result Antenna Requirement N/A FCC Part 15.203/15.247 (c) Pass AC Power Line Conducted Emission ANSI C63.10-2013, Clause 6.2 FCC Part 15.207 N/A Conducted Output Power ANSI C63.10-2013, Clause 11.9.1.3 FCC Part 15.247 (b)(3) Pass 6dB Bandwidth and 99% Occupied Bandwidth ANSI C63.10-2013, Clause 11.8.1 FCC Part 15.247 (a)(2) Pass Power Spectral Density ANSI C63.10-2013, Clause 11.10.2 FCC Part 15.247 (e) Pass Conducted Band edge and spurious emission ANSI C63.10-2013, Clause 11.11 FCC Part 15.247(d) Pass Radiated Band edge and Spurious Emission ANSI C63.10-2013, Clause 11.11 & Clause 11.12 FCC Part 15.205/15.209 Pass Duty Cycle ANSI C63.10-2013, Clause 11.6 None; for reporting purposes only. Pass *This test report is only published to and used by the applicant, and it is not for evidence purpose in China. *The measurement result for the sample received is <Pass> according to <CFR 47 FCC PART 15 SUBPART C(DTS)> when <Accuracy Method> decision rule is applied. REPORT NO.: E04A25080328F00201 Page 4 of 61 TRF No.: 04-E001-0B Global Testing , Great Quality. CONTENTS 1. ATTESTATION OF TEST RESULTS ..................................................................................... 5 2. TEST METHODOLOGY ......................................................................................................... 6 3. FACILITIES AND ACCREDITATION ..................................................................................... 6 4. CALIBRATION AND UNCERTAINTY ................................................................................... 7 4.1. MEASURING INSTRUMENT CALIBRATION ........................................................... 7 4.2. MEASUREMENT UNCERTAINTY ............................................................................ 7 5. EQUIPMENT UNDER TEST .................................................................................................. 8 5.1. DESCRIPTION OF EUT ........................................................................................... 8 5.2. CHANNEL LIST ........................................................................................................ 8 5.3. MAXIMUM CONDUCTED OUTPUT POWER ........................................................... 9 5.4. TEST CHANNEL CONFIGURATION ........................................................................ 9 5.5. THE WORSE CASE POWER SETTING PARAMETER ............................................ 9 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ........................................................... 9 5.7. SUPPORT UNITS FOR SYSTEM TEST ................................................................. 10 5.8. SETUP DIAGRAM .................................................................................................. 10 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 11 7. ANTENNA PORT TEST RESULTS ..................................................................................... 13 7.1. Conducted Output Power ........................................................................................ 13 7.2. 6dB Bandwidth and 99% Occupied Bandwidth ....................................................... 14 7.3. Power Spectral Density ........................................................................................... 16 7.4. Conducted Band edge and spurious emission ........................................................ 17 7.5. Duty Cycle .............................................................................................................. 19 8. RADIATED TEST RESULTS ............................................................................................... 20 8.1. Radiated Band edge and Spurious Emission .......................................................... 26 9. ANTENNA REQUIREMENT ................................................................................................ 38 10. AC POWER LINE CONDUCTED EMISSION ......................................................... 39 11. TEST DATA - Appendix A ..................................................................................... 40 REPORT NO.: E04A25080328F00201 Page 5 of 61 TRF No.: 04-E001-0B Global Testing , Great Quality. 1. ATTESTATION OF TEST RESULTS Applicant Information Company Name: Shenzhen Siindoo Acoustics Technology Co.,Ltd Address: Room D403, No.10th,Huanguan South Road,Junzibu Community ,Guanlan Street, Longhua District, Shenzhen, China Manufacturer Information Company Name: Shenzhen Siindoo Acoustics Technology Co.,Ltd Address: Room D403, No.10th,Huanguan South Road,Junzibu Community ,Guanlan Street, Longhua District, Shenzhen, China EUT Information Product Description: LocatorPr…

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Setup Photographs Radiated Band edge and Spurious Emission Page 2 of 2