2AMLF-KF281SBLE Powered Fuel Level Sensor

Rev6/28/2024 ShenzhenJimiIoTCo.,Ltd. 3-4/F,BlockA,Building#7,ShenzhenInternationalInnovationValley,Dashi1stRoad,NanshanDistrict, Shenzhen,Guangdong,China FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:August6,2025 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2AMLF-KF281S ShenzhenJimiIoTCo.,Ltd.certifiesthattheequipmentforwhichauthorizationissoughtisnot“covered” equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules. Sincerely, ContactPerson: YiXie E-mail:[email protected]

Rev6/28/2024 ShenzhenJimiIoTCo.,Ltd. 3-4/F,BlockA,Building#7,ShenzhenInternationalInnovationValley,Dashi1stRoad,NanshanDistrict, Shenzhen,Guangdong,China FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:August6,2025 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2AMLF-KF281S ShenzhenJimiIoTCo.,Ltd.certifiesthat,asofthedateofthefilingoftheapplication,theapplicantis notidentifiedontheCoveredListasanentityproducing“covered”equipment. Sincerely, ContactPerson:YiXie E-mail:[email protected]

Shenzhen Jimi IoT Co., Ltd. 3-4/F, Block A, Building #7, Shenzhen International Innovation Valley, Dashi 1st Road, Nanshan District, Shenzhen, Guangdong, China Date: August 7, 2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AMLF-KF281S FRN: 0026625269 US Agent – Attestation Statement / Part 2.911(d)(7) Shenzhen Jimi IoT Co., Ltd. certifies, that as of August 7, 2025, we have designated FCC US Agent, LLC to accept service of process on our behalf for FCC ID: 2AMLF-KF281S. Shenzhen Jimi IoT Co., Ltd., accepts to maintain an agent of service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission- related administrative or judicial proceeding involving the equipment, whichever is later. FCC US Agent, LLC, accepts as of the date of the filing of this application, the obligation of being the designated agent for the purpose of accepting service of process on behalf of Shenzhen Jimi IoT Co., Ltd. for FCC ID: 2AMLF-KF281S. Designated Agent Information: Company Name: FCC US Agent, LLC Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA FRN: 0033402884 Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, Company: Shenzhen Jimi IoT Co., Ltd. Designated Agent: FCC US Agent, LLC Company Representative: System engineer Designated Agent Representative: Tim Payne Signature: Signature:

Agent Authorization Company: Shenzhen Jimi IoT Co., Ltd. Address: 3-4/F, Block A, Building #7, Shenzhen International Innovation Valley, Dashi 1st Road, Nanshan District, Shenzhen, Guangdong, China Product Name: BLE Powered Fuel Level Sensor Model Number(s): KF281S Product Description: BLE Powered Fuel Level Sensor 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: 2025-08-07 Name: Wu Xuewen Title: Manager Company: Shenzhen BALUN Technology Co., Ltd.

ShenzhenJimiIoTCo.,Ltd. Date:August6,2025 To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 ToWhomItMayConcern: ShenzhenJimiIoTCo.,Ltd.theundersigned,herebyauthorizesMr.WuXuewenfromShenzhen BALUNTechnologyCo.,Ltd.,toactonthebehalfoftheShenzhenJimiIoTCo.,Ltd.solelyin mattersrelatingtotheapplicationforanFCCequipmentauthorizationforFCCID:2AMLF- KF281SincludingthesigningofdocumentsinconnectionwiththisApplication.Necessaryacts carriedoutbyShenzhenBALUNTechnologyCo.,Ltd.inconnectionwiththeApplicationshall havethesameeffectasactsoftheShenzhenJimiIoTCo.,Ltd. ShenzhenJimiIoTCo.,Ltd.alsoherebycertifythatnopartytothisapplicationissubjecttoa denialofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseAct of1988,21U.S.C.Section862. YoursSincerely, Printname:YiXie Title:Systemengineer ShenzhenJimiIoTCo.,Ltd.

Shenzhen Jimi IoT Co., Ltd. Date: August 12, 2025 To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 RE: FCC ID: 2AMLF-KF281S FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. Shenzhen Jimi IoT Co., Ltd. requests that the following documents regarding this submission for FCC ID: 2AMLF-KF281S be kept Long-Term confidential: Exhibit Type Block Diagram Schematics Operational Description File Name Block Diagram.pdf Schematics.pdf Operational Description.pdf And below exhibit kept short-term confidential (180days): Exhibit TypeFile Name External PhotosExternal Photo.pdf Internal PhotosInternal Photo.pdf Test Setup PhotosTest Setup Photos.pdf Users ManualsUsers Manual.pdf Those documents contain detailed system and equipment description and related information about the product which Shenzhen Jimi IoT Co., Ltd. considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, Shenzhen Jimi IoT Co., Ltd. considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in themarket. Thank you for your attention to thismatter. Print name: Yi Xie Title: System engineer Signature:

1.Label 2.Labellocation:

Report No.: BL-SZ2550464-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: Shenzhen Jimi IoT Co., Ltd. Address: 3-4/F, Block A, Building #7, Shenzhen International Innovation Valley, Dashi 1st Road, Nanshan District, Shenzhen, Guangdong, China Equipment Type: BLE Powered Fuel Level Sensor Model Name: KF281S Brand Name: Jimiiot FCC ID: 2AMLF-KF281S Test Standard: 47 CFR Part 2.1091 KDB 447498 D04 v01 Sample Arrival Date: May 30, 2025 Test Date: Jun. 03, 2025 - Jun. 06, 2025 Date of Issue: Aug. 01, 2025 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ2550464-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Content Rev. 01 Aug. 01, 2025 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................ 3 1.1 Test Laboratory ............................................................................................................ 3 1.2 Test Location ................................................................................................................ 3 2 PRODUCT INFORMATION ....................................................................................................... 4 2.1 Applicant Information .................................................................................................... 4 2.2 Manufacturer Information .............................................................................................. 4 2.3 General Description for Equipment under Test (EUT) ................................................... 4 2.4 Technical Information ................................................................................................... 5 3 SUMMARY OF TEST RESULT ................................................................................................. 6 3.1 Test Standards ............................................................................................................. 6 3.2 Limit Standards ............................................................................................................. 6 4 DEVICE CATEGORY AND LEVELS LIMITS ............................................................................. 7 5 ASSESSMENT RESULT ........................................................................................................... 9 5.1 Output Power ............................................................................................................... 9 5.2 Tune-up power ............................................................................................................. 9 5.3 RF Exposure Evaluation Result .................................................................................... 9 5.4 Conclusion .................................................................................................................... 9 Report No.: BL-SZ2550464-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1/F, Building B, Ganghongji High-tech Intelligent Industrial Park, No. 1008, Songbai Road, Yangguang Community, Xili Sub-district, Nanshan District, Shenzhen, Guangdong Province, P. R. China Accreditation Certificate The laboratory is a testing organization accredited by FCC as a accredited testing laboratory. The designation number is CN1196. Report No.: BL-SZ2550464-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant Shenzhen Jimi IoT Co., Ltd. Address 3-4/F, Block A, Building #7, Shenzhen International Innovation Valley, Dashi 1st Road, Nanshan District, Shenzhen, Guangdong, China 2.2 Manufacturer Information Manufacturer Shenzhen Jimi IoT Co., Ltd. Address 3-4/F, Block A, Building #7, Shenzhen International Innovation Valley, Dashi 1st Road, Nanshan District, Shenzhen, Guangdong, China 2.3 General Description for Equipment under Test (EUT) EUT Name BLE Powered Fuel Level Sensor Model Name Under Test KF281S Series Model Name N/A Description of Model name differentiation N/A Hardware Version YSBLE-P-V2.1 Software Version YSBLE-P-V1.2 Dimensions (Approx.) N/A Weight (Approx.) N/A Report No.: BL-SZ2550464-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 5 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2.4 Technical Information Network and Wireless connectivity Bluetooth (BLE) The requirement for the following technical information of the EUT was…

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求是 价值 双赢 深圳市千目通讯科技有限公司 Shenzhen Qianmu Communication Technology Co.,Ltd. 专注天线方案、设计与生产 客 户：友森 项 目： 日 期：2025-5-22 射 频：QIU ZHI YUAN Shenzhen Qianmu Communication Technology Co.,Ltd. 求是 价值 双赢 目 录 1. 测试环境 2. 历次调试记录说明 3. 匹配电路说明 4. 有源测试数据 5. 传导测试数据 6. 通话电流声模拟测试 7. 环境处理说明 8. GPS/WIFI/BT无源参数 9. GPS/WIFI/BT实测效果 10. 总结 求是 价值 双赢 测试环境 测试项目设备 1. S参数 （S- parameter） 1. 回波损耗 （Return Loss） 2. 电压驻波比（VSWR） 网络分析仪: Agilent E5071B HP 8753D 2. 有源测试 （Active ） 1. 发射功率 （TRP） 2. 接收灵敏度（TIS） 3.频率误差 4.屏灭、屏亮 1. 暗室：ETS 7x4x3 m (3D) Chamber ETS 5x3x3 m (3D) Chamber 2.综合测试仪: Agilent 8960 E5515B ×2 StarPoint SP6011 3.无源测试 （Passive） 1.天线增益 （Gain） 2.天线效率 （Efficiency） 1. 暗室：ETS 7x4x3 m (3D) Chamber ETS 5x3x3 m (3D) Chamber 2. 网络分析仪：Agilent E5071B HP 8753D 求是 价值 双赢 历次调试记录说明 日期版本调试记录说明 2025-5-15 AFPC样，调试样机 求是 价值 双赢 匹配电路-BT天线 原始匹配未更改 求是 价值 双赢 天线无源效率增益数据 Frequency ID 1 2 3 4 5 6 7 8 9 10 11 Frequency (MHz) 2400.02410.02420.02430.02440.02450.02460.02470.02480.02490.02500.0 Point Values Ant. Port Input Pwr. (dBm) 0.000.000.000.000.000.000.000.000.000.000.00 Tot. Rad. Pwr. (dBm) -5.17-5.23-5.25-5.03-5.03-4.77-4.95-5.25-5.27-5.15-5.11 Peak EIRP (dBm) -1.76-1.80-1.72-1.42-1.38-1.15-1.33-1.37-1.20-1.04-1.06 Directivity (dBi) 3.413.443.533.623.653.623.623.894.074.114.05 Efficiency (dB) -5.17-5.23-5.25-5.03-5.03-4.77-4.95-5.25-5.27-5.15-5.11 Efficiency (%) 30.4030.0029.9031.4031.4033.4032.0029.8029.7030.6030.80 Gain (dBi) -1.76-1.80-1.72-1.42-1.38-1.15-1.33-1.37-1.20-1.04-1.06 NHPRP ± Pi/4 (dBm) -6.84-6.96-7.02-6.84-6.86-6.58-6.74-7.03-7.05-6.92-6.87 NHPRP ± Pi/6 (dBm) -8.50-8.66-8.75-8.56-8.54-8.21-8.32-8.59-8.60-8.47-8.43 NHPRP ± Pi/8 (dBm) -9.84-10.02-10.12-9.91-9.83-9.44-9.51-9.74-9.76-9.65-9.63 Upper Hem. PRP (dBm) -8.33-8.36-8.39-8.24-8.30-8.07-8.33-8.72-8.81-8.70-8.60 Lower Hem. PRP (dBm) -8.04-8.13-8.13-7.86-7.80-7.50-7.62-7.85-7.81-7.67-7.69 Upper Hem. PRP (%) 14.6914.5814.4915.0114.7815.5814.7113.4313.1413.4813.81 Lower Hem. PRP (%) 15.7115.3915.3916.3616.5917.7717.3016.4016.5517.1017.01 求是 价值 双赢 天线方向图和苹果图 求是 价值 双赢 天线方向图和苹果图 求是 价值 双赢 天线方向图和苹果图 求是 价值 双赢 天线位置 Shenzhen Qianmu Communication Technology Co.,Ltd. 求是 价值 双赢 提示说明 提示： 一、此数据只针对客户提供样机所产生的数据，不代表客户最终量产状态； 二、请客户仔细确认我司报告中，匹配电路修改及环境处理说明； 三、量产前请配合提供试产样机来我司二次验证；如有更换物料、更新软件及环境 处理等，请提前告知； 四、如客户需要第三方复测，或者送客户测试，请到我司验证后再送样机；防止机 器与调试机有差异； 五：我司不接受，我们调试以外的机器数据和其它暗室测试的数据，但可以参考， 认证暗室除外，如数据有差异，一切以调试机为准去找原因。 Shenzhen Qianmu Communication Technology Co.,Ltd. 求是 价值 双赢 谢谢! 此报告中所包含的一切信息、版权归我司所有，再未经我司许可的情况下，请勿散播给第三方

Report No.: BL-SZ2550464-601 Tel: 86-21-58180736 E-mail: [email protected] Page No. 2 / 48 Web: www.titcgroup.com Template No.: TRP6-EC-09 V2.0 Add: 1-2/F., Building 1, No.222, Xuanlan Road, Xuanqiao, Pudong New District, Shanghai, China Revision History Version Issue Date Revisions Rev. 01 Aug. 04, 2025 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................ 4 1.1 Test Laboratory ............................................................................................................ 4 1.2 Test Location ................................................................................................................ 4 2 PRODUCT INFORMATION ....................................................................................................... 5 2.1 Applicant Information .................................................................................................... 5 2.2 Manufacturer Information .............................................................................................. 5 2.3 Factory Information ....................................................................................................... 5 2.4 General Description for Equipment under Test (EUT) ................................................... 5 2.5 Technical Information ................................................................................................... 6 3 SUMMARY OF TEST RESULTS ............................................................................................... 8 3.1 Test Standards ............................................................................................................. 8 3.2 Test Verdict .................................................................................................................. 8 4 GENERAL TEST CONFIGURATIONS ...................................................................................... 9 4.1 Test Environments ........................................................................................................ 9 4.2 Test Equipment List ...................................................................................................... 9 4.3 Test Software List ......................................................................................................... 9 4.4 Decision Rule ............................................................................................................. 10 4.5 Measurement Uncertainty ........................................................................................... 10 4.6 Description of Test Setup ........................................................................................... 11 4.7 Measurement Results Explanation Example ............................................................... 14 5 TEST ITEMS ........................................................................................................................... 15 5.1 Antenna Requirements ............................................................................................... 15 5.2 Output Power ............................................................................................................. 16 5.3 Occupied Bandwidth ................................................................................................... 17 5.4 Conducted Spurious Emission .................................................................................... 18 Report No.: BL-SZ2550464-601 Tel: 86-21-58180736 E-mail: [email protected] Page No. 3 / 48 Web: www.titcgroup.com Template No.: TRP6-EC-09 V2.0 Add: 1-2/F., Building 1, No.222, Xuanlan Road, Xuanqiao, Pudong New District, Shanghai, China 5.5 Band Edge (Authorized-band band-edge) ................................................................... 20 5.6 Conducted Emission ................................................................................................... 21 5.7 Radiated Spurious Emission ....................................................................................... 22 5.8 Band Edge (Restricted-band band-edge) .................................................................... 26 5.9 Power Spectral density (PSD) .................................................................................... 27 ANNEX A TEST RESULT ........................................................................................................... 28 A.1 Output Power, Duty Cycle .......................................................................................... 28 A.2 Occupied Bandwidth ................................................................................................... 30 A.3 Conducted Spurious Emission .................................................................................... 32 A.3 Band Edge (Authorized-band band-edge) ................................................................... 36 A.4 Conducted Emission ................................................................................................... 38 A.5 Radiated Spurious Emission ....................................................................................... 40 A.7 Band Edge (Restricted-band band-edge) .................................................................... 44 A.8 Power Spectral Density (PSD) .................................................................................... 46 ANNEX B TEST SETUP PHOTOS ............................................................................................. 47 ANNEX C EUT EXTERNAL PHOTOS ......................................................................................... 47 ANNEX D EUT INTERNAL PHOTOS .......................................................................................... 47 Report No.: BL-SZ2550464-601 Tel: 86-21-58180736 E-mail: [email protected] Page No. 4 / 48 Web: www.titcgroup.com Template No.: TRP6-EC-09 V2.0 Add: 1-2/F., Building 1, No.222, Xuanlan Road, Xu…

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