2BAAUFM-BIKELIGHTBike Light

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(Dongguan Sense Lighting Technology Co., Ltd.) (Feb. 20, 2023) 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 (2BAAUFM‐BIKELIGHT) [Dongguan Sense Lighting 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. Sincerely, (Applicant signature) (Applicant printed name) Wayne MA (Dongguan Sense Lighting Technology Co., Ltd.) (Feb. 20, 2023) 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 (2BAAUFM‐BIKELIGHT) [Dongguan Sense Lighting 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) Wayne MA

Dongguan Sense Lighting Technology Co., Ltd. Model Difference Data：2023.03.21 Product description: Bike Light Model name: S500CF, S300CF Trade Name: SENSE FCC ID: 2BAAUFM-BIKELIGHT All the model are the same circuit and RF module, except model names . Regards Sincerely Client’s signature : Client’s name / title : Wayne MA（PM） Contact information / address：No.6 Shengxing Street, Chang'an Town, Dongguan City, Guangdong, China

Dongguan Sense Lighting Technology Co., Ltd. (2023.03.21) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Bike Light / S500CF, S300CF / FCC ID: 2BAAUFM-BIKELIGHT ) 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: Wayne MA Title: PM

Dongguan Sense Lighting Technology Co., Ltd. (2023.03.21) 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: Wayne MA Title: PM

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Shenzhen CTB Testing Co., Ltd. FCC ID: 2BAAUFM-BIKELIGHT 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. BLE: 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 2.402 -0.952 0.80 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.44 -0.639 0.86 0±1 1.00 1.26 <5 0.39330 3.00 YES 2.480 -0.707 0.85 0±1 1.00 1.26 <5 0.39651 3.00 YES GFSK Conclusion: For the max result : 0.39651≤ FCC Limit 3.0 for 1g SAR.

1 Antenna specification 1、Antenna introduction The Bluetooth module antenna is directly used on the PCB. Manufacturer：Lenze Design Inc Address：7th Floor,Ching Po Building,Shenzhen Special Zone Press Group,Futian District,Shenzhen 2、Antenna shape 2 3、Antenna parameter The Bluetooth antenna operates at 2402-2480 MHz and generates resonance in this band. The table below shows the main parameters of the antenna. Frequency(MHz) 2402 ~ 2480 MHz VSWR ≤ 1.95 Impedance 50 Ohm Nominal Return Loss -15 dB Max Radiation Omni-directional Gain (Peak) 0.64 dBi Polarization Linear, Vertical Admitted Power 1MW Connector Tin 3 4、Antenna gain report Spectrum Detector: PK Test Date : Feb 18, 2022 Test By: Mark Temperature : 25°C Test Result: PASS Humidity : 52 % Modulation: GFSK Frequency VNA Separation Read Separation Limit (MHz) E Total. dB(dB) 2400MHz 0.0403503 2410MHz 0.0886264 2420MHz 0.267381 2430MHz 0.193012 2440MHz 0.26366 2450MHz 0.0723139 2460MHz 0.36895 2470MHz 0.551525 2480MHz 0.640702 2490MHz 1.05232 2500MHz 1.08443 4 Direction map： PHI 0° 5 PHI 90° THETA 90°

Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB230223050RF Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 35 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng Arron Liu 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. Product Name: Bike Light FCC ID: 2BAAUFM-BIKELIGHT Trademark: SENSE Model Number: S500CF, S300CF Prepared For: Dongguan Sense Lighting Technology Co., Ltd. Address: No.6 Shengxing Street, Chang'an Town, Dongguan City, Guangdong, China Manufacturer: Dongguan Sense Lighting Technology Co., Ltd. Address: No.6 Shengxing Street, Chang'an Town, Dongguan City, Guangdong, China 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: Feb. 14, 2023 Sample tested Date: Feb. 14, 2023 to Feb. 23, 2023 Issue Date: Feb. 23, 2023 Report No.: CTB230223050RF Test Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB230223050RF Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 35 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 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 7 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 8 5.1 Test Facility ...................................................................................................................................... 8 5.2 Test Instrument Used ....................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 10 6.1 Block Diagram Of Test Setup ......................................................................................................... 10 6.2 Limit ................................................................................................................................................ 10 6.3 Test procedure ............................................................................................................................... 10 6.4 Test Result ..................................................................................................................................... 12 7. RADIATED SPURIOUS EMISSION ............................................................................................. 14 7.1 Block Diagram Of Test Setup ......................................................................................................... 14 7.2 Limit ................................................................................................................................................ 14 7.3 Test procedure ............................................................................................................................... 15 7.4 Test Result ..................................................................................................................................... 16 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 23 8.1 Block Diagram Of Test Setup ......................................................................................................... 23 8.2 Limit ................................................................................................................................................ 23 8.3 Test procedure ............................................................................................................................... 23 8.4 Test Result ..................................................................................................................................... 24 9. COUDUCTED OUTPUT POWER ................................................................................................. 26 9.1 Block Diagram O…

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Radiated Emission Below 1G Above 1G Conducted emissions