2BUPB-6T00AITire Pressure Monitoring Sensor

WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD (January 29, 2026) 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: 2BUPB-6T00AI [WENZHOU AIHU SENSING 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, (Applicant signature) (Applicant printed name) Toby Sun WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD (January 29, 2026) 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: 2BUPB-6T00AI [WENZHOU AIHU SENSING 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, (Applicant signature) (Applicant printed name) Toby Sun

WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD Model Difference Data：January 29, 2026 Product description: Tire Pressure Monitoring Sensor Model name: 6T00AI, 6T103, 6T105, 6T108, 6T109, 6T121, 6T201, 6T203, 6T301, 6T302, 6T303, 6T501, 6T502, 6T503, 6T505, 6T506, 6T507, 6T508, 6T509, 6T510, 6T512, 6T518, 6T601, 6T602, 6T603, 6T604, 6T605, 6T606, 6T607, 6T610 Trade Name: N/A FCC ID: 2BUPB-6T00AI All the model are the same circuit and RF module, only the model names are different. Regards Sincerely Client’s signature : Client’s name / title : Toby Sun（General Manager） Contact information / address：NO.302, BUILDING NO.3, YUNJIANG STANDARD FACTORY, NO.1555 SONGPU EAST ROAD, RUIAN, ZHEJIANG PROVINCE

WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD (January 29, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Tire Pressure Monitoring Sensor / 6T00AI, 6T103, 6T105, 6T108, 6T109, 6T121, 6T201, 6T203, 6T301, 6T302, 6T303, 6T501, 6T502, 6T503, 6T505, 6T506, 6T507, 6T508, 6T509, 6T510, 6T512, 6T518, 6T601, 6T602, 6T603, 6T604, 6T605, 6T606, 6T607, 6T610 / FCC ID: 2BUPB-6T00AI) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Signature: Name: Toby Sun Title: General Manager

WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD (January 29, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name: Toby Sun Title: General Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: 6T00AI External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

FCC ID LABEL: Label Location: FCC ID: 2BUPB-6T00AI Model No.: 6T00AI

Shenzhen CTB Testing Co., Ltd. FCC ID: 2BUPB-6T00AI Portable device According to §15.247(e)(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 SAR 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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 314.9MHz: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion ASK 0.3149 -17.24 0.02 -17±1 -16.00 0.03 <5 0.00282 3.00 YES Note:dbm=dbuv/m-95.2-2.15=75.11-95.2-2.15=-22.24dBm(ERP), so the conduct peak power= -22.24-(-5)=-17.24dBm 433.96MHz: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion ASK0.43396-13.930.04-13±1-12.000.06<50.008313.00YES Note:dbm=dbuv/m-95.2-2.15=78.42-95.2-2.15=-18.93dBm(ERP), so the conduct peak power= -18.93-(-5)=-13.93dBm Conclusion: 315MHz+433MHz supported simultaneous transmission: 315MHz+433MHz: ∑MPE Ratio =0.00282/3+0.00831/3=0.00371≤1, So passed.

Antenna information manufacturer：WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD address：Building 3, Yunjiang Entrepreneurship Park, Nanbin Street, Ruian City, Zhejiang Province model：13T00001 Antenna installation：wide antenna Antenna material： (Cu) Frequency：315/433MHz size：19.5*6.5*12.5mm Number of antenna coils：1 photograph： All measurements were performed radiated and therefore additional antenna gain documentation is not required. Antenna Gain： -5dBi Typical free space radiation pattern：

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 26 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director The test report is effective only with both signature and specialized stamp. This result(s) shown in this report r Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: Tire Pressure Monitoring Sensor FCC ID: 2BUPB-6T00AI Trademark(s): N/A Model/Type reference: 6T00AI, 6T103, 6T105, 6T108, 6T109, 6T121, 6T201, 6T203, 6T301, 6T302, 6T303, 6T501, 6T502, 6T503, 6T505, 6T506, 6T507, 6T508, 6T509, 6T510, 6T512, 6T518, 6T601, 6T602, 6T603, 6T604, 6T605, 6T606, 6T607, 6T610 Applicant’s name: WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD Address: NO.302, BUILDING NO.3, YUNJIANG STANDARD FACTORY, NO.1555 SONGPU EAST ROAD, RUIAN, ZHEJIANG PROVINCE Manufacturer: WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD Address: NO.302, BUILDING NO.3, YUNJIANG STANDARD FACTORY, NO.1555 SONGPU EAST ROAD, RUIAN, ZHEJIANG PROVINCE Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Dec. 16, 2025 Sample tested Date: Dec. 16, 2025 to Jan. 21, 2026 Issue Date: Jan. 21, 2026 Report No.: CTB25121615303RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.231 ANSI C63.10:2020 Test Results PASS Remark: This is 433MHz radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25121615303RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 26 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Test Mode ........................................................................................................................................ 6 4.5 Test Environment ............................................................................................................................. 6 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 7 5.1 Test Facility ...................................................................................................................................... 7 5.2 Test Instrument Used ....................................................................................................................... 7 6. AC POWER LINE CONDUCTED EMISSION .................................................................................. 9 6.1 Block Diagram Of Test Setup ........................................................................................................... 9 6.2 Limit .................................................................................................................................................. 9 6.3 Test procedure ................................................................................................................................. 9 6.4 Test Result ..................................................................................................................................... 10 7. RADIATED EMISSION ................................................................................................................. 11 7.1 Block Diagram Of Test Setup ......................................................................................................... 11 7.2 Limit ................................................................................................................................................ 11 7.3 Test procedure ............................................................................................................................... 12 7.4 Test Result ..................................................................................................................................... 14 8. DWELL TIME ................................................................................................................................ 20 8.1 Block Diagram Of Test Setup ......................................................................................................... 20 8.2 Limit ................................................................................................................................................ 20 8.3 Test procedure ............................................................................................................................... 20 8.4 Test Result .....…

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Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 28 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: Tire Pressure Monitoring Sensor FCC ID: 2BUPB-6T00AI Trademark(s): N/A Model/Type reference: 6T00AI, 6T103, 6T105, 6T108, 6T109, 6T121, 6T201, 6T203, 6T301, 6T302, 6T303, 6T501, 6T502, 6T503, 6T505, 6T506, 6T507, 6T508, 6T509, 6T510, 6T512, 6T518, 6T601, 6T602, 6T603, 6T604, 6T605, 6T606, 6T607, 6T610 Applicant’s name: WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD Address: NO.302, BUILDING NO.3, YUNJIANG STANDARD FACTORY, NO.1555 SONGPU EAST ROAD, RUIAN, ZHEJIANG PROVINCE Manufacturer: WENZHOU AIHU SENSING TECHNOLOGY CO.,LTD Address: NO.302, BUILDING NO.3, YUNJIANG STANDARD FACTORY, NO.1555 SONGPU EAST ROAD, RUIAN, ZHEJIANG PROVINCE Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Dec. 16, 2025 Sample tested Date: Dec. 16, 2025 to Jan. 21, 2026 Issue Date: Jan. 21, 2026 Report No.: CTB25121615303RF02 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.231 ANSI C63.10:2020 Test Results PASS Remark: This is 315MHz radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25121615303RF02 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 28 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ............................................................................................................ 4 2. TEST SUMMARY ................................................................................................ 5 3. MEASUREMENT UNCERTAINTY ...................................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP .................................................. 7 4.1 Product Information ................................................................................................ 7 4.2 Test Setup Configuration ........................................................................................ 7 4.3 Support Equipment ................................................................................................. 7 4.4 Test Mode ............................................................................................................... 7 4.5 Test Environment ................................................................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ............................................. 9 5.1 Test Facility............................................................................................................. 9 5.2 Test Instrument Used ............................................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION .................................................... 11 6.1 Block Diagram Of Test Setup ............................................................................... 11 6.2 Limit ...................................................................................................................... 11 6.3 Test procedure ..................................................................................................... 11 6.4 Test Result............................................................................................................ 13 7. RADIATED EMISSION ...................................................................................... 14 7.1 Block Diagram Of Test Setup ............................................................................... 14 7.2 Limit ...................................................................................................................... 14 7.3 Test procedure ..................................................................................................... 15 7.4 Test Result............................................................................................................ 17 8. DWELL TIME .................................................................................................... 23 8.1 Block Diagram Of Test Setup ............................................................................... 23 8.2 Limit ...................................................................................................................... 23 8.3 Test procedure ..................................................................................................... 23 8.4 Test Result............................................................................................................ 24 9. OCCUPIED BANDWIDTH ................................................................................. 25 9.1 Block Diagram Of Test Setup ............................................................................... 25 9.2 Limit ...................................................................................................................... 25 Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25121615303RF02 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 28 9.3 Test procedure ..................................................................................................... 25 9.4 Test Result................................................................…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: 6T00AI Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions