Z4T-NRF54LM20AXIAO nRF54LM20A

SeeedTechnologyCo.,Ltd. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:29June2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:Z4T-NRF54LM20A SeeedTechnologyCo.,Ltd.(“theapplicant”)certifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. SeeedTechnologyCo.,Ltd.(“theapplicant”)certifiesthattheequipmentforwhichauthorizationis soughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc. oranyofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyof itssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB 986446D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, (Applicantsignature) AlbertMiao SeeedTechnologyCo.,Ltd. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:29June2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:Z4T-NRF54LM20A SeeedTechnologyCo.,Ltd.(“theapplicant”)certifiesthat,asofthedateofthefilingoftheapplication, theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiaries oraffiliates)asanentityproducing“covered”equipment. Sincerely, (Applicantsignature) AlbertMiao

Date:29June2026 SeeedTechnologyCo.,Ltd. To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 ToWhomItMayConcern: TheSeeedTechnologyCo.,Ltd.,theundersigned,herebyauthorizesMr.WuXuewenfrom ShenzhenBALUNTechnologyCo.,Ltd.,toactonthebehalfofthe SeeedTechnologyCo.,Ltd. solelyinmattersrelatingtotheapplicationforanFCCequipmentauthorizationforFCCID:Z4T- NRF54LM20AincludingthesigningofdocumentsinconnectionwiththisApplication.Necessary actscarriedoutbyShenzhenBALUNTechnologyCo.,Ltd.inconnectionwiththeApplication shallhavethesameeffectasactsoftheSeeedTechnologyCo.,Ltd. TheSeeedTechnologyCo.,Ltd.alsoherebycertifythatnopartytothisapplicationissubjectto adenialofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuse Actof1988,21U.S.C.Section862. YoursSincerely, _______ AlbertMiao Projectmanager

SeeedTechnologyCo.,Ltd. Date:June29,2026 To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 RE: FCCID:Z4T-NRF54LM20A FCCCertificationConfidentialityRequest Gentlemen: Thisletteristocomplywith47CFR0.457and0.459pertainingtoconfidentialitymaterial.Seeed TechnologyCo.,Ltd.requeststhatthefollowingdocumentsregardingthissubmissionforFCCID: Z4T- N RF54LM20A bekeptLong-Termconfidential: Andbelowexhibitkeptshort-termconfidential(180days) Exhibit Type Block Diagram Schematics Operational Description File Name Block Diagram.pdf Schematics.pdf Operational Description.pdf : ExhibitTypeFileName ExternalPhotosExternalPhoto.pdf InternalPhotosInternalPhoto.pdf TestSetupPhotosTestSetupPhotos.pdf UsersManualsUsersManual.pdf Thosedocumentscontaindetailedsystemandequipmentdescriptionandrelatedinformation abouttheproductwhichSeeedTechnologyCo.,Ltd.considerstobeconfidentialproprietary,a customdesignand,otherwise,notreleasabletothegeneralpublic.Sincethisdesignisabasis formwhichfuturetechnologicalproductswillevolve,SeeedTechnologyCo.,Ltd.considersthis informationwouldbeofbenefittoitscompetitors,andthatthedisclosureoftheinformation inthesedocumentswouldgivecompetitorsanunfairadvantageinthemarket. Thankyouforyourattentiontothismatter. Printname:AlbertMiao Title:Projectmanager Signature:

Product Model Difference Declaration Declared Models: XIAO nRF54LM20A XIAO nRF54LM20A Sense Description of Differences: Compared to the XIAO nRF54LM20A, the XIAO nRF54LM20A Sense adds the following components: 1. Digital Microphone Specification: SMD omnidirectional microphone, -26dBFS, LGA-6 package, dimensions 4×2×1.1mm 2. 6-Axis Acceleration Sensor (IMU) Specification: SMD 6-axis acceleration sensor, LGA-14L package, dimensions 2.5×3×0.83mm Other than the above additions, the two models are identical in the following aspects: Main chip (nRF54L series) Circuit design (except for the added components noted above) Interface definition and pin assignment Outer dimensions and PCB layout Operating voltage and operating temperature range Software compatibility (The Sense version can run software designed for the base model; additional functions require corresponding drivers) Conclusion: The XIAO nRF54LM20A Sense is an enhanced model based on the XIAO nRF54LM20A with the addition of a microphone and an IMU. All other hardware and electrical characteristics remain the same as those of the base model.

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Report No.: Ti-EE26050152-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile-1 (2026-04-30) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub- district, Bao'an District, Shenzhen TEST REPORT Applicant: Seeed Technology Co., Ltd. Address: 9F,Building G3,TCL International E city, Shuguang Community, Xili street, Nanshan, Shenzhen Equipment Type: XIAO nRF54LM20A Model Name: XIAO nRF54LM20A Sense (refer to section 2.3) Brand Name: Seeed Studio FCC ID: Z4T-NRF54LM20A Test Standard: 47 CFR Part 2.1091 KDB 447498 D04 v01 Sample Arrival Date: May 08, 2026 Test Date: Jun. 02, 2026 Date of Issue: Jun. 23, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Liao Jianming (Technical Director) _______________ _______________ _______________ Report No.: Ti-EE26050152-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile-1 (2026-04-30) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub- district, Bao'an District, Shenzhen Revision History Version Issue Date Revisions Content Rev. 01 Jun. 23, 2026 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.: Ti-EE26050152-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile-1 (2026-04-30) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub- district, Bao'an District, Shenzhen 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55,X iangshan Road, Luotian Community, Yanluo Sub-district, Bao'an District, Shenzhen Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub-district, Bao'an District, Shenzhen, Guangdong 1/F., Building B, Ganghongji High-Tech Intelligent Industrial Park, No.1008, Songbai Road, Yangguang Community, Xili Subdistrict, Nanshan District, Shenzhen, Guangdong Accreditation Certificate The laboratory is a testing organization accredited by FCC as a accredited testing laboratory. The designation number is CN1196. Report No.: Ti-EE26050152-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 10 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile-1 (2026-04-30) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub- district, Bao'an District, Shenzhen 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant Seeed Technology Co., Ltd. Address 9F,Building G3,TCL International E city, Shuguang Community, Xili street, Nanshan, Shenzhen 2.2 Manufacturer Information Manufacturer Seeed Technology Co., Ltd. Address 9F,Building G3,TCL International E city, Shuguang Community, Xili street, Nanshan, Shenzhen 2.3 General Description for Equipment under Test (EUT) EUT Name XIAO nRF54LM20A Model Name Under Test XIAO nRF54LM20A Sense Series Model Name XIAO nRF54LM20A Description of Model name differentiation The XIAO nRF54LM20A Sense is an enhanced model based on the XIAO nRF54LM20A with the addition of a microphone and an IMU. All other hardware and electrical characteristics remain the same as those of the base model. (this information provided by the applicant) Hardware Version 1.0 Software Version 1.0 Dimensions (Approx.) N/A Weight (Approx.) N/A Report No.: Ti-EE26050152-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 5 / 10 Web: www.titcgroup.com…

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MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China. TEL：+86-0755-86503881FAX：+86-0755-27801677E-mail：[email protected] 2.4G35.2x8.5L50CM4Antenna FEATURES&BENEFITS WeldingRG1.13cable,Ipexconnector,3Mstickerforeasyinstallation. Mountingto:non-conductivesurface Installationtype:adhesive APPLICATIONS IoTDevices SmartCities SmartAgriculture ConsumerTracking SmartMetering SmartAgriculture ORDERINFORMATION ProductName2.4G35.2x8.5L50CM4Antenna PartNumberM01-0602150R0A Dimensions35.2x8.5mm Weight0.28g ColorBlack Mountingadhesive AntennaCableDefaultIPEX4RF0.81blackcoaxialcable(Ø0.81x50mm),customizable. REFERENCEGUIDE TechnicalFeatures(MHz)2400-2500 MaxVSWR2.0:1 MaxEfficiency67.62% PeakGain1.86dBi RadiationPattern Omnidirectional PolarizationLinear InputImpedance50Ω OperatingTemperature-40ºCto+85ºC StorageTemperature-40ºCto+85ºC RelativeHumidity10to70% MaterialSubstance Compliance RoHSCompliant Dimensions (LxWxH) 35.2x8.5mm MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] ELECTRICALPERFORMANCE ReturnLoss Efficiency（%） MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] PeakGain（dBi） Freq(MHz)Gain(dBi)Efficiency(%) 24001.6563.89 24101.7863.95 24201.7764.57 24301.8665.80 24401.8066.47 24501.7767.62 24601.4665.93 24701.3163.68 24801.1862.40 24901.0061.04 25000.9760.25 MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] RADIATIONPATTERNS 2DRadiationPatternat2400MHz 2DRadiationPatternat2450MHz 2DRadiationPatternat2500MHz MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] 3DRadiationPatternat2400MHz 3DRadiationPatternat2450MHz MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] 3DRadiationPatternat2500MHz MyAntennaRFTechnologyCo.,Ltd ADD:No.RM410,CountryGardenPhoenixWisdomValley,No.50TiezaiRoad,BaoanDistrict,Shenzhen,P.R.China TEL：+86-0755-86503881E-mail：[email protected] HOUSINGCONFIGURATIONS IPEX 4 50.0±2.0 35.2±0.3 8.5±0.2 Φ0.81±0.1 2.4G A-04 V1.0

Report No.: Ti-EE26050152-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 70 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub-district, Bao'an District, Shenzhen TEST REPORT Applicant: Seeed Technology Co., Ltd. Address: 9F,Building G3,TCL International E city, Shuguang Community, Xili street, Nanshan, Shenzhen Equipment Type: XIAO nRF54LM20A Model Name: XIAO nRF54LM20A Sense (refer to section 2.3) Brand Name: Seeed Studio FCC ID: Z4T-NRF54LM20A Test Standard: 47 CFR Part 15 Subpart C (refer to section 3.1) Sample Arrival Date: May 08, 2026 Test Date: May 10, 2026 - May 20, 2026 Date of Issue: Jun. 23, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Wang Yinglong Checked by: Li Ganming Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: Ti-EE26050152-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 70 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub-district, Bao'an District, Shenzhen Revision History Version Issue Date Revisions Rev. 01 Jun. 23, 2026 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 General Description for Equipment under Test (EUT) ................................................... 5 2.4 Technical Information ................................................................................................... 6 3 SUMMARY OF TEST RESULTS ............................................................................................... 8 3.1 Test Standards ............................................................................................................. 8 3.2 Test Verdict .................................................................................................................. 9 4 GENERAL TEST CONFIGURATIONS .................................................................................... 10 4.1 Test Environments ...................................................................................................... 10 4.2 Test Equipment List .................................................................................................... 10 4.3 Test Software List ....................................................................................................... 10 4.4 Measurement Uncertainty ........................................................................................... 11 4.5 Description of Test Setup ........................................................................................... 11 4.6 Measurement Results Explanation Example ............................................................... 14 5 TEST ITEMS ........................................................................................................................... 15 5.1 Antenna Requirements ............................................................................................... 15 5.2 Output Power ............................................................................................................. 16 5.3 Occupied Bandwidth ................................................................................................... 18 5.4 Conducted Spurious Emission .................................................................................... 20 5.5 Band Edge (Authorized-band band-edge) ................................................................... 22 Report No.: Ti-EE26050152-601 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 70 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.247 (2022-01-12) Add: 601, Building 2, Intelligent Connected Vehicle Industrial Park, No.55, Xiangshan Road, Luotian Community, Yanluo Sub-district, Bao'an District, Shenzhen 5.6 Conducted Emission ................................................................................................... 24 5.7 Radiated Spurious Emission ....................................................................................... 25 5.8 Band Edge (Restricted-band band-edge) .................................................................... 30 5.9 Power Spectral density (PSD) .................................................................................... 33 ANNEX A TEST RESULT ........................................................................................................... 34 A.1 Output Power ............................................................................................................. 34 A.2 Occupied Bandwidth ................................................................................................... 37 A.3 Conducted Spurious Emissions .................................................................................. 41 A.4 Band Edge (Authorized-band band-edge) ................................................................... 46 A.5 Conducted Emissions ................................................................................................. 49 A.6 Radiated Spurious Emission ...........................…

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