2ASNST188Wireless Paging System

COMPANYLETTERHEAD CoveredEquipmentCertificationAttestationLetter 8/25/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa K1V1H2 Canada ATTN.:ReviewingEngineer FCCID:2ASNST188 ShenzhenRetevisTechnologyCo.,Ltd.(“DongfangShen”) certifiesthattheequipment forwhichauthorizationissoughtisnot“covered” equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList , theapplicantshould includeanexplanationonwhytheequipmentisnot“covered” equipment. ShenzhenRetevisTechnologyCo.,Ltd.(“DongfangShen”) certifiesthat,asofthedate ofthefilingoftheapplication,theapplicant isnotidentifiedontheCoveredListasan entityproducing“covered” equipment. ShenzhenRetevisTechnologyCo.,Ltd.(“DongfangShen”) certifiesthattheequipment forwhichauthorizationissoughtdoesnotincludecybersecurityoranti-virussoftware producedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees, includingequipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsand assignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:DongfangShen Title:Manager CompanyName:ShenzhenRetevisTechnologyCo.,Ltd. Date:8/25/2026

ShenzhenRetevisTechnologyCo.,Ltd. FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 7/13/26 U.S.AgentDesignation ShenzhenRetevisTechnologyCo.,Ltd.acknowledgestheirconsentforthefollowingcontactlocatedinthe UnitedStatestoactastheiragentforserviceofprocessfortheequipmentforwhichauthorizationissought(FCC ID:2ASNSTD188): NameandcompanyofU.S.agent:RETEVISINC PhysicalU.S.addressofagent:1733EBROOKPORTSTCOVINA,CA91724UnitedStates FRNofU.S.agent:0033657701 EmailaddressofU.S.agent:[email protected] TelephoneNo:+1（626）3622594 RETEVISINCacknowledgestheirobligationtoacceptserviceofprocessonbehalfofShenzhenRetevis TechnologyCo.,Ltd. ShenzhenRetevisTechnologyCo.,Ltd.withtheFRN0028298024acceptsitsobligationtomaintainanagent forserviceofprocessintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofany Commission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirementslistedunder§ 2.911(d)(7). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB 986446D01. Anexpirationdateforthisletterdoesnotexist.IncasetheU.S.agentchanges,thegranteeisobligatedtonotify theFCCwithin30daysviathegrantingTCB. Sincerely, Signature [Name]DongfangShen [Title]GeneralManager [Company]ShenzhenRetevisTechnologyCo.,Ltd. 4 8 _ [ m o d e l ] U S _ A g e n t _ 2 . 9 1 1 ( d ) ( 7 ) - U , V 0 5 ShenzhenRetevisTechnologyCo.,Ltd. Signature [NameofU.S.agent]LIUYELI [TitleofU.S.agent]Director [CompanyofU.S.agent]RETEVISINC

ShenzhenRetevisTechnologyCo.,Ltd. August25,2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY-FCC FCCID:2ASNST188 PursuanttoSections0.457(d)and0.459oftheCommission’sRulesandFCCGuidancedocument 726920,weherebyrequestpermanentconfidentialtreatmentofexhibitsidentifiedassuchinthetable belowandrequesttheyarepermanentlywithheldfrompublicreviewbasedonthedocuments containingtradesecretsandproprietaryinformationnotcustomarilyreleasedtothepublic.Thepublic disclosureofthisinformationmightbeharmfultotheapplicantandprovideunjustifiedbenefitstoits competitors. Wealsorequestshort-termconfidentialityoncertainexhibitsuntiltheintendeddateofmarketingas outlinedbelow.Werequesttheexhibitsbewithheldfrompublicviewforaperiodof180days.We attestmarketingoftheproductwillonlycommenceaftertheperiodofshort-termconfidentialityexpires, orifmarketingistocommencebeforetherequestednumberofdayslistedabove,thegranteewill informNemkotoreleasetheShort-TermConfidentialityinformationwithheldontheFCCequipment authorizationwebsite. ExhibitTypeofConfidentialityRequested BlockDiagrams☒Permanent ☐ShortTerm ExternalPhotos------------------☒ShortTerm InternalPhotos ☐ Permanent* ☒ShortTerm OperationDescription☒Permanent ☐ShortTerm PartsList&Placement/BOM ☐Permanent☐ShortTerm Tune-UpProcedure ☐Permanent☐ShortTerm SchematicDiagrams☒Permanent ☐ShortTerm TestSetupPhotos------------------☒ShortTerm User’sManual ☐Permanent* ☒ShortTerm Theasteriskeditems(*)requirefurtherinformationtobeprovidedinthisjustificationletterbeforepermanentconfidentiality willbeextendedtotheseexhibits.PleaserefertoFCCKDB726920D01foundat: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731andreviewsectionII,3)regarding specificinformationthatmustaccompanytheserequests. Note:anydocumentsheldundertheShort-Termconfidentialitywillautomaticallybecomepublicafter therequestedtimeifanappropriateextensionrequesthasnotbeenreceived.Anyexhibits(i.e., schematicdiagrams)thatmayhavealreadybeenrequestedtohave“Permanent”confidentialityas shownaboveneednotberepeatedunderShort-Termconfidentialityrequest. Sincerely, Signed: Printedname:DongfangShen Title:Manager CompanyName:ShenzhenRetevisTechnologyCo.,Ltd.

FamilyCertificationAttestationLetter 2026/8/25 NemkoCanadaInc 303RiverRoad Ottawa K1V1H2 Canada CompanyName:ShenzhenRetevisTechnologyCo.,Ltd. FCCID:2ASNST188 Models:TD188,TD188S,TD188P,TD188U WeherebyrequestFamilyCertificationfortheabovementionedModelsbasedonthem beingelectricallyidentical. Abovemodelsareidenticalinschematicandstructure,onlythecolourisdifferent forallthemodels,thereforethetestperformedonthemodel__TD188__. Signed: Printedname:DongfangShen Title:Manager Date:2026/8/25

LabelLocationOnEUT Label:(Size:4.9cm*3.9cm)

RFEXPOSUREEVALUATION EUTSpecification FCCID:2ASNST188 EUTWirelessPagingSystem ModelNameTD188,TD188S,TD188P,TD188U Frequencyband (Operating) WLAN:2.412GHz~2.462GHz WLAN:5.18GHz~5.32GHz/5.50GHz~5.70GHz WLAN:5.745GHz~5825GHz Others(433.92MHz) DevicecategoryPortable(<20cmseparation) Mobile(>20cmseparation) Others___ AntennadiversitySingleantenna Multipleantennas Txdiversity Rxdiversity Tx/Rxdiversity Max.outputpower68.94dBuV/m(-26.318dBm)(0.002mW) Antennagain0.36dBi EvaluationappliedMPEEvaluation SAREvaluation StandardRequirement PortableDevice 2.1093Radiofrequencyradiationexposureevaluation:portabledevices. Accordingto§15.247(i)and§1.1307b(1),systemsoperatingundertheprovisionsofthissection shallbeoperatedinamannerthatensuresthatthepublicisnotexposedtoradiofrequency energylevelsinexcessoftheCommission’sguidelines.SeeKDB447498D01GeneralRF ExposureGuidanceV6,section4.3.1. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances ≤ 50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)] · [ √ f(GHz)] ≤ 3.0for1-gSARand ≤ 7.5for10-gextremitySAR, 16 where · f(GHz)istheRFchanneltransmitfrequencyinGHz · PoweranddistanceareroundedtothenearestmWandmmbeforecalculation17 · Theresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis ≤ 50 mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion. MeasurementResult Channel Frequency (GHz) MaxOutput power (dBm) Maxtune-up tolerance Outputpower (dBm) MaxOutput power (dBm) MaxOutput power (mW) Calculation Value (Note1) Threshold Value 433.92-26.318 -26.318 ± 1 -25.3180.0020.0083323.0 EIRP=E-104.8+20logD=68.94-104.8+20log3=-26.318dbm Note1:CalculationValue=[(max.powerofchannel,mW)/(min. testseparationdistance,mm)]·[√f(GHz)]. Foxexample:0.002/5*√433.92=0.008332≤3.0 AccordingtoKDB447498D01V6,thresholdatwhichnoSARrequiredis≤3.0for1-gSAR, separationdistanceis5mm,andnosimultaneousSARmeasurementisrequired. TheSARmeasurementisnotnecessary.

Page 1 of 27 Code:AB-RF-05-b FCCTestReport ReportNo.:1812C60361512501 Applicant:ShenzhenRetevisTechnologyCo.,Ltd. Address: 7/F,13-C,ZhonghaixinScience&Technology Park,No.12Ganli6thRoad,JihuaStreet, LonggangDistrict,ShenzhenChina ProductName:WirelessPagingSystem ReportDate:2026-08-25 ShenzhenAnbotekComplianceLaboratoryLimited #资质章# # 检测章 # # 报告二维码 # ReportNo.:1812C60361512501Page2of27 FCCID:2ASNST188 Code:AB-RF-05-b Contents 1.GeneralInformation............................................................................................................................................5 1.1.ClientInformation....................................................................................................................................5 1.2.DescriptionofDevice(EUT)..................................................................................................................5 1.3.AuxiliaryEquipmentUsedDuringTest.................................................................................................6 1.4.DescriptionofTestConfiguration..........................................................................................................6 1.5.DescriptionofTestSetup.......................................................................................................................7 1.6.TestEquipmentList.................................................................................................................................8 1.7.MeasurementUncertainty......................................................................................................................9 1.8.DescriptionofTestFacility.....................................................................................................................9 1.9.Disclaimer...............................................................................................................................................10 2.SummaryofTestResults.................................................................................................................................11 3.ConductedEmissionTest................................................................................................................................12 3.1.TestStandardandLimit........................................................................................................................12 3.2.TestSetup...............................................................................................................................................12 3.3.TestProcedure.......................................................................................................................................12 3.4.TestData.................................................................................................................................................12 4.FieldStrengthofFundamentalandSpuriousEmission.............................................................................15 4.1.TestStandardandLimit........................................................................................................................15 4.2.TestSetup...............................................................................................................................................16 4.3.TestProcedure.......................................................................................................................................17 4.4.TestData.................................................................................................................................................17 5.20dBOccupyBandwidthTest.........................................................................................................................22 5.1.TestStandardandLimit........................................................................................................................22 5.2.TestSetup...............................................................................................................................................22 5.3.TestProcedure.......................................................................................................................................22 5.4.TestData.................................................................................................................................................23 6.TransmissionCeaseTimeTest......................................................................................................................24 6.1.TestStandardandLimit........................................................................................................................24 6.2.TestSetup...............................................................................................................................................24 6.3.TestProcedure.......................................................................................................................................24 6.4.TestData.................................................................................................................................................25 7.AntennaRequirement......................................................................................................................................26 7.1.TestStandardandRequirement.........................................................................................................26 7.2.AntennaConnectedConstruction.......................................................................................................26 APPENDIXI--TESTSETUPPHOTOGRAPH................................................................................................27 APPENDIXII--EXTERNALPHOTOGRAPH..................................................................................................27 APPENDIXIII--INTERNALPHOTOGRAPH...................................................................................................27 ReportNo.:1812C60361512501Page3of27 FCC…

Text truncated - open the document above for the full version.

TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page1 SpecificationForApproval Date:2026.7.14 Version:1.0 客户名称 Customer： 客户料号 CustomerP/N HONG KONG RETEKESS CO.,LIMITED ：21600073 腾祥料号 TXP/N：AN0433-02BC02SM-B 规格描述 Description: TengxiangCheckedBy: 腾祥审 433MHz SMA 核 CustomerApprovedBy: 客户审核 DRAWN 制作 郑雪岭 TESTEDBY 检测 CHECKEDBY 审核 胡超 CHECKEDBY 审核 Q.C.DEPT. 品管 陈祖喜 Q.C.DEPT. 品管 APPROVEDBY 核准 袁江福 APPROVEDBY 核准 NO.53ShatouShaChongRoad,ChangAnTown,Guangdongprovince,China 中国广东省东莞市长安镇沙头区沙涌路53号 TEL:86-769-81873082FAX:86-769-82663788 http://www.tenxiang.cn TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page2 Index: 1.Specification(规格) 2.CharacteristicsandReliabilityTest(产品特性和可靠性测试标准) 3.Antenna-SParameterTestData(样品测试数据) 4.Testenvironmentandequipment（测试环境以及设备） 5.Antenna-RadiationPatternTestData(辐射模式测试数据) 6.MechanicalandPackingDrawing(图纸包装规范) RevisionHistory（变更履历） RevisionDateChangeNotificationDescription 1.02026.7.13 初版 TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page3 1.Specification SamplePhoto A.ElectricalCharacteristics 433MHFrequencyz <=2.S.W.R.0 Antenna Gain Linea 0.36dBi Polarization r 50Oh Impedance m B.Material&MechanicalCharacteristics TPE/ABS/POMaterial of PlasticM Cable Type SMAPLU RG178 Connector TypeG C.Environmental -30 ̊C~+65 ̊Storage Temperature C -30 ̊C~+65 ̊Operation Temperature C Manufacturer:HONG KONG RETEKESS CO.,LIMITED Address:FLAT/RM 1019B 10/F LIVEN HOUSE NO.61-63 KING YIP STREET KWUN TONG KL TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page4 2.CharacteristicsandReliabilityTest TestItems 测试 项目 TestConditionandProcedure 测试方法 Requirements 要求Result 结果 1V.S.W.R. 电压驻波比 SetDUTonNetworkAnalyzer;makeindividual calibrationtotest设置网络分析仪参数进行测试 DirectiveDUTspecification 符合待测物规范 PASS 2Antenna Gain 天线增益 SetDUTonAntennaChamber;makeindividual calibrationtotest设置天线暗室参数进行测试 DirectiveDUTspecification 符合待测物规范 PASS 3PullTest 拉力 Holdingwithindividualspecification;force appliedtoaxisofterminal.单独定义产品端子拉力 1.DirectiveDUTspecification 2.FrequencyTol.≤5% 符合待测物规范;频率偏移≤5% PASS 4TorqueTest 扭力 Holdingwithindividualspecification;applied clockwiseandcounterclockwisetotheaxisof terminal 单独定义产品端子之顺时针及逆时针扭力 1.DirectiveDUTspecification 2.FrequencyTol.≤5% 符合待测物规范;频率偏移≤5% PASS 5Dimension 尺寸 Inspectionofdimension,color,material,package, surfaceprocess.检查尺寸,颜色,材料,包装,表面处理 DirectiveDUTspecification 符合待测物规范 PASS 6 SaltSpray盐 雾 GB/T2423.17-2008 Temp:35°C;RH:≥95%;NaClsolution:≥ 5%;Time:24H 温度35°C；湿度≥95%;盐水浓度≥5%；测试24H 1.NoVisualDamage 2.FrequencyTol.≤5% 无明显外观不良;频率偏移≤5% PASS 7Temperature and Humidity Chamber 恒温恒湿 GB/T2423.3-2006 Temp:65°C/12H;-30°C/12HRH:≥90%;Time: 24H 温度65°C测试12H转-30°C测试12H；湿度≥90%； 时间24H After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.≤5% 恢复2H后，无明显外观不良;频 率偏移≤5% PASS 8Agingtest 老化 GB/T2423.2-2008 Temp:65°C;Time:24hours 温度65°C，测试24H After2HoursRecovery 1.NoVisualDamage 2.FrequencyTol.≤5% 无明显外观不良;频率偏移≤5% PASS 9RoHSWithReferencetoIEC62321:2008withflowchart 参考IEC62321测试流程 DirectiveRoHS2011/65/EU 符合RoHS2015/863/EU标准 PASS TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page5 3. Antenna - S Parameter Test Data Test Equipment: VSWR was measured using an Agilent E5071C connected to a test fixture, with the device in free-space condition. TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page6 4. Test environment and equipment Darkroom Specifications：6m*6m*6m/7m*3m*3m LTE-TDD/FDD-SCDMA : ROHDE&SCHWARZ CMW500 Passive efficiency testing equipment:Agilent Technologies E5071B \ TengxiangTechnology.Inc 东莞市腾祥电子有限公司 ProductNumber:AN0433-02BC02SM-B ProductName:Antenna Page7 5.Antenna-RadiationPatternTestData 433MHz 6. Mechanical Drawing See attached files AN0433-02BC02SM-B 433.92MHz Antenna ±0.5±0.2 ±1 1/1 A SCALE: APP BY Tolerance X.XX X.X X° TITLE: PART NO.: DWG NAME: CHK BY DES BY RF BY UNITS: mm REVISION: Tengxiang Technology Inc. B C D APPROVER DATE SIGN DESCRIPTION Note: 1. Dimension: Take * is the important dimension 2. Tolerance: Unma rked tolerance refer to the standard tolerance please dwf 2024.03.22 WJ 2024.03.22 HC 2024.03.22 YCX 2024.03.22 TPEE Part Number Name Body 1 1 No. Q'ty 1 Material Finish Black POM Hinge Pin AN01-1215-P-1 2 Black 1 11 Black 2345 AN58-02B-C Body 3 ABS Body 2 AN0202-01B ANT02-03B-1 SMA508-N8MNAN02 Black SMA PLUG ABS Black 1 6 Cable Ø1.78mm;Red RG-178U-04 20pcs/ PE bag Revision : A Customer : ALL APPROVED BY ： CHECKED BY： DESIGNED BY： Name: Page: 1 of 1 Date: Part Number : 產品包裝規範 PACKING CRITERION 1000pcs/Carton 3. SEALING 。 MEAS G W: KGS N W: KGS QTY: PCS ITEM NO: C/NO MADE IN CHINA SIDE FRONT 2.PACKING。 1 . Enter PE bag。 dwf HC YCX AN0433-02BC02SM-B Antenna 2024.03.22