2BDZM-T21TPMS

ShenzhenChemeiTechnologyCo.,Ltd. FederalCommunicationsCommissionDate:2025-12-03 AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 SUBJECT:FCCApplicationforFCCID:2BDZM-T21 ToWhomItMayConcern: Duetothesizeofthedevice,weherebydeclarethatourproductissosmallthatitis impracticaltolabelitwiththeFCCIDandthe15.19warningstatement,thereforewe willplacetheFCCIDandthe15.19warningstatementintheusermanualandalsoon thedevicepackaging. Ifyouhaveanyquestionsregardingthisapplication,pleasefeelfreetocontactme. Sincerely, Signature:_________________________________ CompanyName:ShenzhenChemeiTechnologyCo.,Ltd. Name:ZHIJIANWU E-mail:[email protected]

Theproductdoesnothaveenoughspacetoplacethelabel,andFCCID labelisreflectedintheusermanualandpackage,asbelow: Usermanual Package

FCC ID:2BDZM-T21

Report No. : EED32R81900702Page 1 of 6 1 COVER PAGE RF Exposure Evaluation Report Product:TPMS Trade mark:N/A Model/Type reference :T21, T22 , T23 , T25 Serial Number:N/A Report Number:EED32R81900702 FCC ID:2BDZM-T21 Date of Issue:Nov. 05, 2025 Test Standards: 47 CFR Part 1.1307 47 CFR Part 1.1310 47 CFR Part 2.1091 47 CFR Part 2.1093 447498 D04 Interim General RF Exposure Guidance v01 Test result:PASS Prepared for: Shenzhen Chemei Technology Co., Ltd. 5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Prepared by: Centre Testing International Group Co., Ltd. Hongwei Industrial Zone, Bao’an 70 District, Shenzhen, Guangdong, China TEL: +86-755-3368 3668 FAX: +86-755-3368 3385 Compiled by: Reviewed by: Frazer LiKeven Tan Approved by: Date:Nov. 05, 2025 Aaron Ma Check No.: 7444141025 Report No. : EED32R81900702Page 2 of 6 2 Contents Page 1 COVER PAGE....................................................................................................................................................................1 2 CONTENTS........................................................................................................................................................................2 3 GENERAL INFORMATION..............................................................................................................................................3 3.1 CLIENTINFORMATION................................................................................................................................................... 3 3.2 GENERALDESCRIPTION OFEUT...................................................................................................................................3 3.3 PRODUCTSPECIFICATION SUBJECTIVE TO THIS STANDARD...........................................................................................3 3.4 TESTLOCATION.............................................................................................................................................................4 3.5 DEVIATION FROMSTANDARDS......................................................................................................................................4 3.6 ABNORMALITIES FROMSTANDARDCONDITIONS..........................................................................................................4 3.7 OTHERINFORMATIONREQUESTED BY THECUSTOMER................................................................................................4 4 SAR EVALUATION...........................................................................................................................................................5 4.1 RF EXPOSURECOMPLIANCEREQUIREMENT.................................................................................................................5 4.1.1 Limits....................................................................................................................................................................5 4.1.2 EUT RF Exposure Evaluation..........................................................................................................................5 Report No. : EED32R81900702Page 3 of 6 3 General Information 3.1 Client Information Applicant:Shenzhen Chemei Technology Co., Ltd. Address of Applicant:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Manufacturer:Shenzhen Chemei Technology Co., Ltd. Address of Manufacturer:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Factory:Shenzhen Chemei Technology Co., Ltd. Address of Factory:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City 3.2 General Description of EUT Product Name:TPMS Model No.(EUT):T21, T22 , T23 , T25 Test Model:T21 Trade Mark:N/A 3.3 Product Specification subjective to this standard Frequency Rang e:433.92MHz Modulation Type:Fix Location Test Power Grade:Default Antenna Type: Spring Antenna Antenna Gain: 0 dBi Power Supply:Battery:DC 3V Sample Received Date: Oct. 14, 2025 Sample tested Date: Oct. 14, 2025 to Oct. 21, 2025 Remark: Model No.: T21, T22 , T23 , T25 Only the model T21 was tested. Their electrical circuit design, layout, components used and internal wiring are identical. Only the color and product name are different. Report No. : EED32R81900702Page 4 of 6 3.4 Test Location All tests were performed at: Centre Testing International Group Co., Ltd Building C, Hongwei Industrial Park Block 70, Bao'an District, Shenzhen, China Telephone: +86 (0) 755 33683668 Fax:+86 (0) 755 33683385 No tests were sub-contracted. FCC Designation No.: CN1164, ISED test site number:7408A, CAB identifier number : CN0037 3.5 Deviation from Standards None. 3.6 Abnormalities from Standard Conditions None. 3.7 Other Information Requested by the Customer None. Report No. : EED32R81900702Page 5 of 6 4 SAR Evaluation 4.1 RF Exposure Compliance Requirement 4.1.1Limits KDB447498 D01 General RF Exposure Guidance v06, Clause 4.3.1(a) [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] • [√f(GHz)] ≤ 3.0 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 test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm, and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 4.1 f) is applied to determine SAR test exclusion. 4.1.2EUT RF Exposure Evaluation Type Frequency (MHz) Field strength (max)(dBuV/m) Maximum Tune-up (dBm) Maximum Tune-up (mW) Calculating data LimitResult FSK433.917436.38-570.0000020.00000073.0Pass Note： dBuV/m to dBm, dBm = dBuV/m – 95.2 ①Note: The exposure evaluat…

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: Shenzhenquanchengspringhardwareco.,ltd Companyaddress:Floor1,BuildingB,TaixinglongIndustrialCity,Zhongwu,Xixiang,BaoanDistrict,Shenzhen. Tel:0755-27695493Fax:0755-2731993413692105493LuQuanjin(Mr.) Productspecification manuf acturer ShenzhenChemeiTechnologyCo.,Ltd.sketch name ofan article Tirepressure antenna specificati ons 0.7*17.4*3.2 pr oj ec t technicalrequirement textur eof wood Wire Diam eter outside diameter heightfoot length sense of rotatio n surface treatment drawin g spring steel 0.717.43.28RightEnvironm ental protection nickel di m en si on al ga gi ng TestitemStandar dvalue solidsidevalue d decide one2threefourfivesixseveneightnine10 Wire Diameter 0.7±0.05 0.70.70.70.70.70.70.70.70.70.7 qualified outside diameter 17.4±0.2 17.3417.3817.3117.417.3617.3217.2817.3417.3617.41 height 3.2±0.25 3.13.263.253.143.383.253.243.183.213.25 foot length 8±0.2 8.067.948.088.028.18.067.948.088.028.1 life working environment Dry,moisture-proofandacid-base-freesubstances Working times Morethan500thousandtimes ForcedataWhenthe strengthis 1N. / Rustresistance Numberof inspections (10) Nooxidationonthesurfaceof saltsprayfor12hours. decid e qualified criterion upper/ better/ previo us/a surna me tin Numberof inspections (10) Goodtinplating performance decid e qualified criterion baginstall2500PCSEachpouchdecide thatit Comprehensive judgment Qualified√unqualifiedinspector: MoShaoxun. Qualitycontrol: PengJinda Date:20251121 Handle opinions Speciallyselectedbyandrejectedby . Qualitycontrol:Date: InspectiontoolAverniercaliper√Bmicrometer√C projector Dgoniometere dynamometer Fvisualinspection √Gothers E l e c t r i c a l p e r f o r m a n c e Encodingformat:433MHZ(surfacemountIC) Workingvoltage:3V Staticcurrent(no-load):3uA Operatingcurrent(on-load):20mA Operatingtemperature:-16to45 Storagetemperature:-25to55 Carrierfrequency:433MHZ Gain:0dBi Launchdistance:Morethan15meters

Report No. : EED32R81900701Page 1 of 26 TEST REPORT Product:TPMS Trade mark:N/A Model/Type reference :T21, T22 , T23 , T25 Serial Number:N/A Report Number:EED32R81900701 FCC ID:2BDZM-T21 Date of Issue:Nov. 05, 2025 Test Standards: 47 CFR Part 15 Subpart C Test result:PASS Prepared for: Shenzhen Chemei Technology Co., Ltd. 5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Prepared by: Centre Testing International Group Co., Ltd. Hongwei Industrial Zone, Bao’an 70 District, Shenzhen, Guangdong, China TEL: +86-755-3368 3668 FAX: +86-755-3368 3385 Compiled by: Reviewed by: Frazer LiKeven Tan Approved by: Date:Nov. 05, 2025 Aaron Ma Check No.: 7444141025 Report No. : EED32R81900701Page 2 of 26 1 Test Summary Test ItemTest RequirementTest methodResult Antenna Requirement 47 CFR Part 15 Subpart C Section 15.203 ANSI C63.10:2020 PASS AC Power Line Conducted Emission 47 CFR Part 15 Subpart C Section 15.207 ANSI C63.10:2020 PASS Field Strength of the Fundamental Signal 47 CFR Part 15 Subpart C Section 15.231 (b) ANSI C63.10:2020 PASS Spurious Emissions 47 CFR Part 15 Subpart C Section 15.231 (b)/15.209 ANSI C63.10:2020 PASS 20dB Bandwidth 47 CFR Part 15 Subpart C Section 15.231 (c) ANSI C63.10:2020 PASS Dwell Time 47 CFR Part 15 Subpart C Section 15.231 (a)(2) ANSI C63.10:2020 PASS Remark: Model No.: T21, T22 , T23 , T25 Only the model T21 was tested. Their electrical circuit design, layout, components used and internal wiring are identical. Only the color and product name are different. Report No. : EED32R81900701Page 3 of 26 2 Contents 1 TEST SUMMARY.......................................................................................................................................................2 2 CONTENTS.................................................................................................................................................................3 3 GENERAL INFORMATION......................................................................................................................................4 3.1CLIENTINFORMATION........................................................................................................................................... 4 3.2GENERALDESCRIPTION OFEUT........................................................................................................................... 4 3.3TESTENVIRONMENT ANDMODE...........................................................................................................................5 3.4DESCRIPTION OFSUPPORTUNITS..........................................................................................................................5 3.5TESTLOCATION.....................................................................................................................................................5 3.6DEVIATION FROMSTANDARDS..............................................................................................................................5 3.7ABNORMALITIES FROMSTANDARDCONDITIONS.................................................................................................. 5 3.8OTHERINFORMATIONREQUESTED BY THECUSTOMER........................................................................................ 5 3.9MEASUREMENTUNCERTAINTY(95%CONFIDENCE LEVELS,K=2)........................................................................6 4 EQUIPMENT LIST......................................................................................................................................................7 5 TEST RESULTS AND MEASUREMENT DATA.................................................................................................10 5.1ANTENNAREQUIREMENT.....................................................................................................................................10 5.2SPURIOUSEMISSIONS...........................................................................................................................................11 5.2.1 Duty Cycle................................................................................................................................................. 11 5.2.2 Spurious Emissions..................................................................................................................................14 5.320DB BANDWIDTH...............................................................................................................................................20 5.4DWELLTIME........................................................................................................................................................21 APPENDIX 1 PHOTOGRAPHS OF TEST SETUP................................................................................................23 APPENDIX 2 PHOTOGRAPHS OF EUT................................................................................................................ 25 Report No. : EED32R81900701Page 4 of 26 3 General Information 3.1 Client Information Applicant:Shenzhen Chemei Technology Co., Ltd. Address of Applicant:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Manufacturer:Shenzhen Chemei Technology Co., Ltd. Address of Manufacturer:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City Factory:Shenzhen Chemei Technology Co., Ltd. Address of Factory:5th Floor, Building 2, No. 263 Changfeng Road, Fenghuang Community, Fenghuang Sub-district, Guangming District, Shenzhen City 3.2 General Description of EUT Product Name:TPMS Model No.(EUT):T21, T22 , T23 , T25 Test Model:T21 Trade Mark:N/A Product Ty pe:MobilePortableFix Location Frequency Range: 433.9174MHz Modulation Type: FSK Number of Channels: 1 (declared by the client) Antenna Type: Spring Antenna Antenna Gain: 0 dBi Power Supp…

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