2BTCZ-S238Wireless Portable Monitor

ShenzhenDongfangxuanTechnologyCo.,Ltd. Address：Room501,BuildingAB,No.9,DongcaiIndustrialZone,GushuCommunity,Xixiang Street,Bao'anDistrict,Shenzhen Date:2025-12-22 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BTCZ-S238 FRN:0037684065 (“ShenzhenDongfangxuanTechnologyCo.,Ltd.”)certifiesthat,asofthedateofthefilingof theapplication,GOLDENVICTORYINTERNATIONALTRADINGCOLTDisourdesignated U.S.agentforserviceofprocessfortheabovereferencedFCCID.(“Shenzhen DongfangxuanTechnologyCo.,Ltd.”)acceptstomaintainanagentfornolessthanoneyear afterthegranteehasterminatedallmarketingandimportationortheconclusionofany Commission-relatedproceedinginvolvingtheequipment. GOLDENVICTORYINTERNATIONALTRADINGCOLTDaccepts,asofthedateofthefiling oftheapplication,theobligationofthedesignatedU.S.agentforserviceofprocessforthe abovereferencedFCCID. DesignatedU.S.AgentInformation: Name:GOLDENVICTORYINTERNATIONALTRADINGCOLTD Address:11016THSTREETSUITE1400DENVER,CO80202UnitedStates FRN：0036377570 ContactPerson:LeonHowar Tel.:(337)255-0461 Email:[email protected] Sincerely, Signedonbehalfof（Shenzhen DongfangxuanTechnologyCo.,Ltd.） SignedonbehalfofGOLDENVICTORY INTERNATIONALTRADINGCOLTD Name:JIYAOQUName:LeonHowar Title:legalpersonTitle:Manager Date:2025-12-22Date:2025-12-22

Rev1/26/2023 (ShenzhenDongfangxuanTechnologyCo.,Ltd.) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:12-18-2025 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BTCZ-S238 (“ShenzhenDongfangxuanTechnologyCo.,Ltd.”)certifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. (“ShenzhenDongfangxuanTechnologyCo.,Ltd.”)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): (Applicantprintedname):JIYAOQU Rev1/26/2023 (ShenzhenDongfangxuanTechnologyCo.,Ltd.) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:12-18-2025 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BTCZ-S238 (“ShenzhenDongfangxuanTechnologyCo.,Ltd.”)certifiesthat,asofthedateofthefilingofthe application,ShenzhenDongfangxuanTechnologyCo.,Ltd.isnotidentifiedontheCoveredList(asa specificallynamedentityoranyofitssubsidiariesoraffiliates)asanentityproducing“covered” equipment. Sincerely, (Applicantsignature): (Applicantprintedname):JIYAOQU

深圳市飞敏科技有限公司 ShenZhen City FeiMin Technology CO.,LTD. 产品承认书 SPECIFICATION FOR APPROVED 客户 CUSTOMER: 深圳市多琳科技有限公司 6KHQ]KHQ'XROLQ7HFKQRORJ\&R/WG 产品名称 PRODUCTS: FPC天线 )3&$QWHQQD 客户料号 PART NO: 产品型号 Spec.: FM-S2748-投屏器 )063URjHFWLRQDHYLFH 日期 Data: 2025.12.1 备注：承认盖章后请回复一份承认书（或复印件）给我司，其余由贵公司存档 REMARK:Please send us one(or copy)of this approval with stamp after accepting,other copies filed by the customer. 地址：深圳市宝安区西乡街道固兴社区盛辉路 4 号科运达电商基地 8 楼 801室 ADD: Room 801, 8th Floor, Keyunda E-commerce Base, No. 4 Shenghui Road, Guxing Community, Xixiang Subdistrict, Baoan District, Shenzhen. 电话Tel: 0755-23035723 传真Fax: 0755-23036702 邮箱E-mail: [email protected] 网址HTTP:www.fmant.cn 客户 CUSTOMER 承认 ACCEPTED BY 审核 CHECKED BY 批准 APPROVED BY 供应商 SUPPLIER 拟制 PREPARED BY 审核 CHECKED BY 批准 APPROVED BY ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 2 目录 产品承认书 ..................................................................................................................... 1 1. 项目信息Project Information .................................................................................. 4 1.1. 外观尺寸Appearance and Dimensions .......................................................... 4 2. 电气性能 Electrical Characteristics ......................................................................... 5 2.1.测试环境条件Test Environment Conditions.................................................5 2.2.测示方法Measurement method.....................................................................5 2.2.1.天线电压驻波比Antenna VSWR...............................................................5 2.2.2.天线回波损耗Antenna Return loss...................................................6 2.3.天线无源测试数据Antenna passive test data.................................6 2.3.1.测试系统Test system...............................................................................6 2.3.2天线效率及增益Antenna efficiency and gain..............................7 2.3.2.天线辐射方向图Antenna Radiation Pattern.......................................8 3.备注Notes....................................................................................................................9 ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 3 Revision history 版本 9HUVLRQ 日期 'DWH 状态 6WDWXV A1 2025-12-1 首版 )LUVWHGLWLRQ ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 4 1. 项目信息Project Information 1.1. 外观尺寸Appearance and Dimensions ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 5 2. 电气性能 Electrical Characteristics 2.1. 测试环境条件Test Environment Conditions 温度Temperature Ordinary Temperature (5 to 35°C) 湿度Humidity Ordinary Humidity (25 to 85% RH) 2.2. 测示方法Measurement method 2.2.1. 天线电压驻波比Antenna VSWR ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 6 2.2.2. 天线回波损耗Antenna Return loss 2.3. 天线无源测试数据 Antenna passive test data 2.3.1. 测试系统Test system 深圳市飞敏科技有限公司（24探头OTA微波暗室） 6hHQzhHQ)HLPLQ7HFhQRORJ\&R,LWG 3URbH27$0LFURwDYH$QHFhRLF&hDPbHU ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 7 2.3.2天线效率及增益Antenna efficiency and gain ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd 8 2.3.2. 天线辐射方向图Antenna Radiation Pattern ANTENNA SPECIFICATION 深圳市飞敏科技有限公司 Shenzhen Feimin Technology Co.,Ltd9 3.备注Notes 1、安装时注意不能离金属部分太近，以避免影响天线性能。  :hHQLQVWDOOLQJ,bHVXUHQRWWRSODFHLWWRRFORVHWRWhHPHWDOSDUWVWRDYRLGDIIHFWLQJ WhHDQWHQQDSHUIRUPDQFH 2、此款天线只适用此机型，天线的位置不可以随意改动，若用于其它机器上导致效果变差，与我司无关。  7hLVDQWHQQDLVRQO\DSSOLFDbOHWRWhLVPRGHO7hHSRVLWLRQRIWhHDQWHQQDFDQQRWbHFhDQJHG DWwLOOIILWLVXVHGRQRWhHUPDFhLQHV,WhHHIIHFWwLOOGHWHULRUDWHDQGLWLVQRWUHODWHG WRRXUFRPSDQ\ 3、本承认书所使用数据（如：天线效率、增益等）均为本承认项目/天线在深圳市飞敏科技有限公司 实验室测试所得出数据。  7hHGDWDXVHGLQWhLVGHFODUDWLRQ VXFhDVDQWHQQDHIILFLHQF\,JDLQ,HWF DUHDOOWhHGDWD RbWDLQHGIURPWhHWHVWLQJRIWhLVGHFODUDWLRQSURjHFWDQWHQQDLQWhHODbRUDWRU\RI 6hHQzhHQ)HLPLQ7HFhQRORJ\&R,LWG

ShenzhenDongfangxuanTechnologyCo.,Ltd. Date:December18,2025 ProductModelNumber:S238,S116,S156,S185 FCCID:2BTCZ-S238 Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title:legalperson Email:[email protected] Telephone:13715187183 Onbehalfof:ShenzhenDongfangxuanTechnologyCo.,Ltd.

ShenzhenDongfangxuanTechnologyCo.,Ltd. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:December20,2025 Subject;RequestforConfidentiality FCCID:2BTCZ-S238 ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:JIYAOQU Title:legalperson

ShenzhenDongfangxuanTechnologyCo.,Ltd. ModelDifference Date:2025-12-18 Productdescription:WirelessPortableMonitor Modelname:S238,S116,S156,S185 FCCID:2BTCZ-S238 ThescreensizesofmodelsS238andS116aredifferent.Theonlydifferencesbetween othermodelsandS238lieintheirmodelnames. Client’ssignature: Client’sname/title:JIYAOQU/legalperson Contactinformation/address:Room501,BuildingAB,No.9,DongcaiIndustrialZone, GushuCommunity,XixiangStreet,Bao'anDistrict,Shenzhen

FCCID:2BTCZ-S238 EUTPHOTOSExternalPhotos FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 ※※※※※ENDOFREPORT※※※※※

ShenzhenDongfangxuanTechnologyCo., Ltd. FCCSoftwareConfigurationControlDeclaration Date:December18,2025 FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Attn:OETDept. Product/ModelNumber: WirelessPortableMonitor/S238,S116,S156,S185 FCCID:2BTCZ-S238 RegardingFCCCountryCodeSelectionguidelinesidentifiedinKDB594280. “Allapplicationsforequipmentauthorizationfortransmittersthatcanhave radioparameters,orothertechnicalparameters,reportedtotheCommission setbysoftwaremusthaveanattestationindicatingthatnothirdpartywillhave software,orconfigurationcontrol,toprogramthedeviceoutofcomplianceof thetechnicalrulesunderwhichithasbeencertified.” Wedeclarethatnothirdpartywillhavesoftware,orconfigurationcontrol,toprogram thedeviceoutofcomplianceofthetechnicalrulesunderwhichithasbeencertified. Name:JIYAOQUDate:December18,2025 Title:legalperson Signatureofapplicant ：

Size:80mmX35mm

FCCID:2BTCZ-S238 EUTPHOTOSInternalPhotos ANT FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 FCCID:2BTCZ-S238 ※※※※※ENDOFREPORT※※※※※

FCCID:2BTCZ-S238 RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1091， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. Limits Thecriterialistedinthefollowingtableshallbeusedtoevaluatetheenvironmentimpactof humanexposuretoradiofrequency(RF)radiationasspecifiedin1.1307(b) LimitsforMaximumPermissibleExposure(MPE) Frequency range (MHz) Electricfield strength (V/m) Magneticfield strength (A/m) Powerdensity (mW/cm 2 ) Averagingtime (minutes) (A)LimitsforOccupational/ControlledExposures 0.3–3.06141.63*(100)6 3.0–301842/f4.89/f*(900/f 2 )6 30–30061.40.1631.06 300–1500f/3006 1500–100,00056 (B)LimitsforGeneralPopulation/UncontrolledExposure 0.3–1.346141.63*(100)30 1.34–30824/f2.19/f*(180/f 2 )30 30–30027.50.0730.230 300–1500f/150030 1500–100,0001.030 f=frequencyinMHz Friistransmissionformula:Pd=(Pout*G)/(4*pi*r 2 ) Where Pd=powerdensityinmW/cm 2 ,Pout=outputpowertoantennainmW; G=gainofantennainlinearscale,Pi=3.1416; R=distancebetweenobservationpointandcenteroftheradiatorincm PdidthelimitofMPE,1mW/cm 2 .Ifweknowthemaximumgainoftheantennaandthe totalpowerinputtotheantenna,throughthecalculation,wewillknowthedistancerwhere theMPElimitisreached. TestProcedure SoftwareprovidedbyclientenabledtheEUTtotransmitandreceivedataatlowest,middle andhighestchannelindividually. TestResultofRFExposureEvaluation Mode Max.Output powerto antenna (dBm) Max.Output powerto antenna (mW) Max.Power Densityat R=20cm (mW/cm2) Limit (mW/cm2) Result 2.4GWIFI19.7794.840.03751.0PASS 5.2GWIFI12.6818.540.00991.0PASS 5.8GWIFI15.7237.330.02001.0PASS Thedevicecouldsupporttransmissionwith5.2GWIFI,5.8GWIFI,2.4GWIFIsimultaneously. MPE1/LIMIT+MPE2/LIMIT+MPE3/LIMIT=0.0375/1+0.0099/1+0.0200/1=0.0674≤1.0 Conclusion:0.235≤1.0orFCCSAR,NoRFExposureEvaluation/SARtestisrequired. Remark:5.2G&5.8GWIFIAntennagain=4.29dBi,2.4GWIFIAntennagain=2.98dBi Conclusion:NoRFExposureEvaluationSARtestisrequired.

FCCID:2BTCZ-S238Page1of36 AppendixAfor5.2GWIFITestData ProductName:WirelessPortableMonitor TestModel:S238 EnvironmentalConditions Temperature:25.7°C RelativeHumidity:54.9% ATMPressure:101.0kPa TestEngineer:LeonLi Supervisedby:BaretWu FCCID:2BTCZ-S238Page2of36 DutyCycle ModeFrequency(MHz)AntennaT on ms T otal ms DutyCycle (%) CorrectionFactor (dB) 1/T (kHz) a5180Ant12.062.1994.060.270.49 a5200Ant12.062.2392.380.340.49 a5240Ant12.072.2293.240.30.48 n205180Ant11.922.11910.410.52 n205200Ant11.932.0394.580.240.52 n205240Ant11.932.0395.070.220.52 n405190Ant10.941.1085.450.681.06 n405230Ant10.951.1483.330.791.05 Note: 1.DutyCycle=T on /T otal 2.CorrectionFactor=10log(1/DutyCycle). 3.1/T=1/T on FCCID:2BTCZ-S238Page3of36 TestGraphs DutyCycleNVNTa5180MHzAnt1 DutyCycleNVNTa5200MHzAnt1 FCCID:2BTCZ-S238Page4of36 DutyCycleNVNTa5240MHzAnt1 DutyCycleNVNTn205180MHzAnt1 FCCID:2BTCZ-S238Page5of36 DutyCycleNVNTn205200MHzAnt1 DutyCycleNVNTn205240MHzAnt1 FCCID:2BTCZ-S238Page6of36 DutyCycleNVNTn405190MHzAnt1 DutyCycleNVNTn405230MHzAnt1 FCCID:2BTCZ-S238Page7of36 MaximumConductedOutputPower ModeFrequency (MHz) AntennaConductedPower (dBm) Duty Factor(dB) TotalPower (dBm) Limit (dBm) Verdict a5180Ant112.120.2712.3924Pass a5200Ant112.120.3412.4624Pass a5240Ant112.380.312.6824Pass n205180Ant110.40.4110.8124Pass n205200Ant110.460.2410.724Pass n205240Ant110.690.2210.9124Pass n405190Ant110.290.6810.9724Pass n405230Ant110.580.7911.3724Pass FCCID:2BTCZ-S238Page8of36 TestGraphs PowerNVNTa5180MHzAnt1 PowerNVNTa5200MHzAnt1 FCCID:2BTCZ-S238Page9of36 PowerNVNTa5240MHzAnt1 PowerNVNTn205180MHzAnt1 FCCID:2BTCZ-S238Page10of36 PowerNVNTn205200MHzAnt1 PowerNVNTn205240MHzAnt1 FCCID:2BTCZ-S238Page11of36 PowerNVNTn405190MHzAnt1 PowerNVNTn405230MHzAnt1 FCCID:2BTCZ-S238Page12of36 -26dBBandwidth ConditionModeFrequency (MHz) -26dBBandwidth (MHz) Limit-26dBBandwidth (MHz) Verdict NVNTa518028.895N/APass NVNTa520027.957N/APass NVNTa524026.609N/APass NVNTn20518024.332N/APass NVNTn20520023.341N/APass NVNTn20524021.356N/APass NVNTn40519048.711N/APass NVNTn40523048.881N/APass FCCID:2BTCZ-S238Page13of36 TestGraphs -26dBBandwidthNVNTa5180MHzAnt1 -26dBBandwidthNVNTa5200MHzAnt1 FCCID:2BTCZ-S238Page14of36 -26dBBandwidthNVNTa5240MHzAnt1 -26dBBandwidthNVNTn205180MHzAnt1 FCCID:2BTCZ-S238Page15of36 -26dBBandwidthNVNTn205200MHzAnt1 -26dBBandwidthNVNTn205240MHzAnt1 FCCID:2BTCZ-S238Page16of36 -26dBBandwidthNVNTn405190MHzAnt1 -26dBBandwidthNVNTn405230MHzAnt1 FCCID:2BTCZ-S238Page17of36 OccupiedChannelBandwidth ConditionModeFrequency(MHz)Antenna99%OBW(MHz) NVNTa5180Ant116.395 NVNTa5200Ant116.376 NVNTa5240Ant116.377 NVNTn205180Ant117.44 NVNTn205200Ant117.453 NVNTn205240Ant117.443 NVNTn405190Ant135.483 NVNTn405230Ant135.472 FCCID:2BTCZ-S238Page18of36 TestGraphs OBWNVNTa5180MHzAnt1 OBWNVNTa5200MHzAnt1 FCCID:2BTCZ-S238Page19of36 OBWNVNTa5240MHzAnt1 OBWNVNTn205180MHzAnt1 FCCID:2BTCZ-S238Page20of36 OBWNVNTn205200MHzAnt1 OBWNVNTn205240MHzAnt1 FCCID:2BTCZ-S238Page21of36 OBWNVNTn405190MHzAnt1 OBWNVNTn405230MHzAnt1 FCCID:2BTCZ-S238Page22of36 MaximumPowerSpectralDensityLevel ModeFrequency (MHz) AntennaConducted PSD (dBm/MHz) DutyFactor (dB) TotalPSD (dBm/MHz) Limit (dBm/MHz) Verdict a5180Ant1-0.920.27-0.6511Pass a5200Ant1-0.710.34-0.3711Pass a5240Ant1-1.830.3-1.5311Pass n205180Ant1-3.90.41-3.4911Pass n205200Ant1-2.420.24-2.1811Pass n205240Ant1-2.440.22-2.2211Pass n405190Ant1-11.30.68-10.6211Pass n405230Ant1-9.680.79-8.8911Pass FCCID:2BTCZ-S238Page23of36 TestGraphs PSDNVNTa5180MHzAnt1 PSDNVNTa5200MHzAnt1 FCCID:2BTCZ-S238Page24of36 PSDNVNTa5240MHzAnt1 PSDNVNTn205180MHzAnt1 FCCID:2BTCZ-S238Page25of36 PSDNVNTn205200MHzAnt1 PSDNVNTn205240MHzAnt1 FCCID:2BTCZ-S238Page26of36 PSDNVNTn405190MHzAnt1 PSDNVNTn405230MHzAnt1 FCCID:2BTCZ-S238Page27of36 BandEdge ConditionModeFrequency (MHz) AntennaMaxValue (dBm) Limit(dBm)Verdict NVNTa5180Ant1-32.82-27Pass NVNTa5240Ant1-47.32-27Pass NVNTn205180Ant1-39.27-27Pass NVNTn205240Ant1-47.14-27Pass NVNTn405190Ant1-30.65-27Pass NVNTn405230Ant1-45.67-27Pass FCCID:2BTCZ-S238Page28of36 TestGraphs BandEdgeNVNTa5180MHzLowAnt1 BandEdgeNVNTa5240MHzHighAnt1 FCCID:2BTCZ-S238Page29of36 BandEdgeNVNTn205180MHzLowAnt1 BandEdgeNVNTn205240MHzHighAnt1 FCCID:2BTCZ-S238Page30of36 BandEdgeNVNTn405190MHzLowAnt1 BandEdgeNVNTn405230MHzHighAnt1 FCCID:2BTCZ-S238Page31of36 FrequencyStability Voltage Test Mode Channel Voltage [Vdc] Temperature (°C) MeasuredFrequency (MHz) Limit (MHz) Verdict a5180 NVNT5180.08 Within 5150-5250MHz PassLVNT5180.04 HVNT5180.05 Temperature Test Mode Channel Voltage [Vdc] Temperature (°C) MeasuredFrequency (MHz) Limit (MHz) Verdict a5180 NV-305180.07 Within 5150-5250MHz Pass NV-205180.05 NV-105180.01 NV05180.02 NV105180.05 NV205180.01 NV305180.04 NV405180.05 NV505180.06 Note:Onlyshowtheworstcase802.11aMode5180MHz. FCCID:2BTCZ-S238Page32of36 ConductedRFSpuriousEmission ConditionModeFrequency (MHz) AntennaMaxValue (dBm) Limit(dBm)Verdict NVNTa5180Ant1-37.31-27Pass NVNTa5200Ant1-37.02-27Pass NVNTa5240Ant1-37.21-27Pass NVNTn205180Ant1-37.42-27Pass NVNTn205200Ant1-37.34-27Pass NVNTn205240Ant1-36.92-27Pass NVNTn405190Ant1-37.01-27Pass NVNTn405230Ant1-37.01-27Pass FCCID:2BTCZ-S238Page33of36 TestGraphs Tx.SpuriousNVNTa5180MHzAnt1Emission Tx.SpuriousNVNTa5200MHzAnt1Emission FCCID:2BTCZ-S238Page34of36 Tx.SpuriousNVNTa5240MHzAnt1Emission Tx.SpuriousNVNTn205180MHzAnt1Emission FCCID:2BTCZ-S238Page35of36 Tx.SpuriousNVNTn205200MHzAnt1Emission Tx.SpuriousNVNTn205240MHzAnt1Emission FCCID:2BTCZ-S238Page36of36 Tx.SpuriousNVNTn405190MHzAnt1Emission Tx.SpuriousNVNTn405230MHzAnt1Emission

FCCID:2BTCZ-S238Page1of36 AppendixAfor5.8GWIFITestData ProductName:WirelessPortableMonitor TestModel:S238 EnvironmentalConditions Temperature:25.7°C RelativeHumidity:54.9% ATMPressure:101.0kPa TestEngineer:LeonLi Supervisedby:BaretWu FCCID:2BTCZ-S238Page2of36 DutyCycle ModeFrequency(MHz)AntennaT on ms T otal ms DutyCycle (%) Correction Factor(dB) 1/T(kHz) a5745Ant12.072.2990.390.440.48 a5785Ant12.072.1695.830.180.48 a5825Ant12.062.2093.640.290.49 n205745Ant11.922.1489.720.470.52 n205785Ant11.922.1290.570.430.52 n205825Ant11.922.0494.120.260.52 n405755Ant10.941.1283.930.761.06 n405795Ant10.941.1482.460.841.06 Note: 1.DutyCycle=T on /T otal 2.CorrectionFactor=10log(1/DutyCycle). 3.1/T=1/T on FCCID:2BTCZ-S238Page3of36 TestGraphs DutyCycleNVNTa5745MHzAnt1 DutyCycleNVNTa5785MHzAnt1 FCCID:2BTCZ-S238Page4of36 DutyCycleNVNTa5825MHzAnt1 DutyCycleNVNTn205745MHzAnt1 FCCID:2BTCZ-S238Page5of36 DutyCycleNVNTn205785MHzAnt1 DutyCycleNVNTn205825MHzAnt1 FCCID:2BTCZ-S238Page6of36 DutyCycleNVNTn405755MHzAnt1 DutyCycleNVNTn405795MHzAnt1 FCCID:2BTCZ-S238Page7of36 MaximumConductedOutputPower ConditionModeFrequency (MHz) AntennaConducted Power(dBm) Duty Factor (dB) Total Power (dBm) Limit (dBm) Verdict NVNTa5745Ant115.280.4415.7230Pass NVNTa5785Ant115.470.1815.6530Pass NVNTa5825Ant114.280.2914.5730Pass NVNTn205745Ant113.450.4713.9230Pass NVNTn205785Ant113.650.4314.0830Pass NVNTn205825Ant112.390.2612.6530Pass NVNTn405755Ant113.370.7614.1330Pass NVNTn405795Ant113.660.8414.530Pass FCCID:2BTCZ-S238Page8of36 TestGraphs PowerNVNTa5745MHzAnt1 PowerNVNTa5785MHzAnt1 FCCID:2BTCZ-S238Page9of36 PowerNVNTa5825MHzAnt1 PowerNVNTn205745MHzAnt1 FCCID:2BTCZ-S238Page10of36 PowerNVNTn205785MHzAnt1 PowerNVNTn205825MHzAnt1 FCCID:2BTCZ-S238Page11of36 PowerNVNTn405755MHzAnt1 PowerNVNTn405795MHzAnt1 FCCID:2BTCZ-S238Page12of36 -6dBBandwidth ConditionModeFrequency (MHz) Antenna-6dBBandwidth (MHz) Limit-6dBBandwidth (MHz) Verdict NVNTa5745Ant115.110.5Pass NVNTa5785Ant115.0540.5Pass NVNTa5825Ant115.4440.5Pass NVNTn205745Ant114.9860.5Pass NVNTn205785Ant115.0770.5Pass NVNTn205825Ant111.710.5Pass NVNTn405755Ant128.8020.5Pass NVNTn405795Ant130.0440.5Pass FCCID:2BTCZ-S238Page13of36 TestGraphs -6dBBandwidthNVNTa5745MHzAnt1 -6dBBandwidthNVNTa5785MHzAnt1 FCCID:2BTCZ-S238Page14of36 -6dBBandwidthNVNTa5825MHzAnt1 -6dBBandwidthNVNTn205745MHzAnt1 FCCID:2BTCZ-S238Page15of36 -6dBBandwidthNVNTn205785MHzAnt1 -6dBBandwidthNVNTn205825MHzAnt1 FCCID:2BTCZ-S238Page16of36 -6dBBandwidthNVNTn405755MHzAnt1 -6dBBandwidthNVNTn405795MHzAnt1 FCCID:2BTCZ-S238Page17of36 OccupiedChannelBandwidth ConditionModeFrequency(MHz)Antenna99%OBW(MHz) NVNTa5745Ant116.439 NVNTa5785Ant116.567 NVNTa5825Ant116.527 NVNTn205745Ant117.457 NVNTn205785Ant117.447 NVNTn205825Ant117.475 NVNTn405755Ant135.431 NVNTn405795Ant135.482 FCCID:2BTCZ-S238Page18of36 TestGraphs OBWNVNTa5745MHzAnt1 OBWNVNTa5785MHzAnt1 FCCID:2BTCZ-S238Page19of36 OBWNVNTa5825MHzAnt1 OBWNVNTn205745MHzAnt1 FCCID:2BTCZ-S238Page20of36 OBWNVNTn205785MHzAnt1 OBWNVNTn205825MHzAnt1 FCCID:2BTCZ-S238Page21of36 OBWNVNTn405755MHzAnt1 OBWNVNTn405795MHzAnt1 FCCID:2BTCZ-S238Page22of36 MaximumPowerSpectralDensityLevel ModeFrequency (MHz) AntennaConducted PSD (dBm/510KHz) Duty Factor (dB) RB factor(dB) TotalPSD (dBm/510KHz) Limit (dBm/500KHz) Verdict a5745Ant1-2.82-0.0860.44 -2.47 30Pass a5785Ant1-2.69-0.0860.18 -2.60 30Pass a5825Ant1-2.99-0.0860.29 -2.79 30Pass n205745Ant1-3.98-0.0860.47 -3.60 30Pass n205785Ant1-4.19-0.0860.43 -3.85 30Pass n205825Ant1-4.26-0.0860.26 -4.09 30Pass n405755Ant1-10.94-0.0860.76 -10.27 30Pass n405795Ant1-9.06-0.0860.84 -8.31 30Pass RBfactor=10lg(MeasureRB/500),MeasureRB=510kHz TotalPSD=ConductedPSD+Dutyfactor(dB)+RBfactor(dB) FCCID:2BTCZ-S238Page23of36 TestGraphs PSDNVNTa5745MHzAnt1 PSDNVNTa5785MHzAnt1 FCCID:2BTCZ-S238Page24of36 PSDNVNTa5825MHzAnt1 PSDNVNTn205745MHzAnt1 FCCID:2BTCZ-S238Page25of36 PSDNVNTn205785MHzAnt1 PSDNVNTn205825MHzAnt1 FCCID:2BTCZ-S238Page26of36 PSDNVNTn405755MHzAnt1 PSDNVNTn405795MHzAnt1 FCCID:2BTCZ-S238Page27of36 BandEdge ConditionModeFrequency (MHz) AntennaMaxValue (dBm) Limit(dBm)Verdict NVNTa5745Ant1-18.48RefertothetestdiagramPass NVNTa5825Ant1-25.12RefertothetestdiagramPass NVNTn205745Ant1-20.71RefertothetestdiagramPass NVNTn205825Ant1-33.38RefertothetestdiagramPass NVNTn405755Ant1-18.01RefertothetestdiagramPass NVNTn405795Ant1-33.8RefertothetestdiagramPass FCCID:2BTCZ-S238Page28of36 TestGraphs BandEdgeNVNTa5745MHzLowAnt1 BandEdgeNVNTa5825MHzHighAnt1 FCCID:2BTCZ-S238Page29of36 BandEdgeNVNTn205745MHzLowAnt1 BandEdgeNVNTn205825MHzHighAnt1 FCCID:2BTCZ-S238Page30of36 BandEdgeNVNTn405755MHzLowAnt1 BandEdgeNVNTn405795MHzHighAnt1 FCCID:2BTCZ-S238Page31of36 FrequencyStability Voltage Test Mode Channel Voltage [Vdc] Temperature (°C) MeasuredFrequency (MHz) Limit (MHz) Verdict a5745 NVNT5744.94 Within 5725-5850MHz PassLVNT5744.94 HVNT5744.92 Temperature Test Mode Channel Voltage [Vdc] Temperature (°C) MeasuredFrequency (MHz) Limit (MHz) Verdict a5745 NV-305744.94 Within 5725-5850MHz Pass NV-205744.98 NV-105744.99 NV05745.02 NV105744.98 NV205744.95 NV305744.91 NV405744.93 NV505744.92 Note:Onlyshowtheworstcase802.11aMode5745MHz. FCCID:2BTCZ-S238Page32of36 ConductedRFSpuriousEmission ConditionModeFrequency(MHz)AntennaMaxValue(dBm)Limit(dBm)Verdict NVNTa5745Ant1-36.96-27Pass NVNTa5785Ant1-36.8-27Pass NVNTa5825Ant1-36.44-27Pass NVNTn205745Ant1-36.95-27Pass NVNTn205785Ant1-36.72-27Pass NVNTn205825Ant1-36.92-27Pass NVNTn405755Ant1-37.18-27Pass NVNTn405795Ant1-37.14-27Pass FCCID:2BTCZ-S238Page33of36 TestGraphs Tx.SpuriousNVNTa5745MHzAnt1Emission Tx.SpuriousNVNTa5785MHzAnt1Emission FCCID:2BTCZ-S238Page34of36 Tx.SpuriousNVNTa5825MHzAnt1Emission Tx.SpuriousNVNTn205745MHzAnt1Emission FCCID:2BTCZ-S238Page35of36 Tx.SpuriousNVNTn205785MHzAnt1Emission Tx.SpuriousNVNTn205825MHzAnt1Emission FCCID:2BTCZ-S238Page36of36 Tx.SpuriousNVNTn405755MHzAnt1Emission Tx.SpuriousNVNTn405795MHzAnt1Emission

ProjectNo.:ZHT-251126111W02-1 Page 1 of 49 FCCTESTREPORT FCCID:2BTCZ-S238 ReportNo........................:ZHT-251126111W02-1 Product............................:WirelessPortableMonitor Trademark.......................:/ Model(s)...........................:S238, S116,S156,S185 ModelDifference..............:ThescreensizesofmodelsS238andS116aredifferent.Theonly differencesbetweenothermodelsandS238lieintheirmodelnames. Applicant..........................:ShenzhenDongfangxuanTechnologyCo.,Ltd. Address............................:Room501,BuildingAB,No.9,DongcaiIndustrialZone,Gushu Community,XixiangStreet,Bao'anDistrict,Shenzhen Manufacturer....................:ShenzhenDongfangxuanTechnologyCo.,Ltd. Address............................:Room501,BuildingAB,No.9,DongcaiIndustrialZone,Gushu Community,XixiangStreet,Bao'anDistrict,Shenzhen Preparedby.....................:GuangdongZhonghanTestingTechnologyCo.,Ltd. Address............................:Room104/201,Building1,YibaolaiIndustrialPark,Qiaotou,Fuhai Subdistrict,Bao'anDistrict,Shenzhen,Guangdong,China DateofReceipt................:Nov.26,2025 DateofTest(s).................:Nov.26,2025toDec.15,2025 DateofIssue....................:Dec.15,2025 TestStandard(s)..............:FCCPart15SubpartE15.407 KDB789033D02GeneralU-NIITestProceduresNewRulesv02r01 Testprocedure................ANSIC63.10-2020 Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. Preparedby:Reviewedby:Approvedby: KimiLu/EngineerBaretWu/DirectorLeviLee/Manager Note:Theresultsshowninthistestreportreferonlytothesample(s)testedunlessotherwisestated.Thistest reportshallnotbereproducedexceptinfull,withoutpriorwrittenapprovalofZHT.Thisdocumentmaybe alteredorrevisedbyZHT,personnelonly,andshallbenotedintherevisionofthedocument. ProjectNo.:ZHT-251126111W02-1 Page 2 of 49 TableofContentsPage 1.SUMMARYOFTESTRESULTS..............................................................................................................4 2.GENERALINFORMATION.....................................................................................................................5 2.1GENERALDESCRIPTIONOFEUT...............................................................................................5 2.2DESCRIPTIONOFTESTMODES..................................................................................................7 2.3BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED.............................8 2.4DESCRIPTIONOFSUPPORTUNITS(CONDUCTEDMODE)......................................................8 3.TESTFACILITYANDTESTINSTRUMENTUSED................................................................................9 3.1TESTFACILITY...............................................................................................................................9 3.2EQUIPMENTSLISTFORALLTESTITEMS.................................................................................9 3.3TESTINGSOFTWARE..................................................................................................................10 3.4MEASUREMENTUNCERTAINTY................................................................................................11 4.EMCEMISSIONTEST...........................................................................................................................12 4.1CONDUCTEDEMISSIONMEASUREMENT................................................................................12 4.2RADIATEDEMISSIONMEASUREMENT.....................................................................................18 5.POWERSPECTRALDENSITYTEST...................................................................................................34 5.1APPLIEDPROCEDURES/LIMIT.................................................................................................34 5.2TESTPROCEDURE......................................................................................................................35 5.3DEVIATIONFROMSTANDARD...................................................................................................35 5.4TESTSETUP.................................................................................................................................35 5.5EUTOPERATIONCONDITIONS..................................................................................................35 5.6TESTRESULTS............................................................................................................................36 6.26DB&6DB&99%EMISSIONBANDWIDTH.....................................................................................37 6.1APPLIEDPROCEDURES/LIMIT.................................................................................................37 6.2TESTPROCEDURE......................................................................................................................37 6.3EUTOPERATIONCONDITIONS..................................................................................................38 6.4TESTRESULTS............................................................................................................................38 7.MAXIMUMCONDUCTEDOUTPUTPOWER........................................................................................39 7.1PLIEDPROCEDURES/LIMIT...................................................................................…

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