2BTKU-GP-420DThermal Barcode Printer, Barcode Label Printer, Thermal Label Printer

FCC Caution. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class B digital device , pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -Reorient or relocate the receiving antenna. -Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.-Consult the dealer or an experienced radio/TV technician for help. *RF warning for Mobile device: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

ZhuhaiHowbestLabelPrinterCo.,Ltd CoveredEquipmentCertificationAttestationLetter 12/10/2025 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa K1V1H2 Canada ATTN.:ReviewingEngineer FCCID:2BTKU-GP-420D ZhuhaiHowbestLabelPrinterCo.,Ltd(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. ZhuhaiHowbestLabelPrinterCo.,Ltd(“theapplicant”)certifiesthat,asofthedateof thefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListasanentity producing“covered”equipment. ZhuhaiHowbestLabelPrinterCo.,Ltd(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtdoesnotincludecybersecurityoranti-virussoftware producedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees, includingequipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsand assignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:ChengchengLi Title:Manager CompanyName:ZhuhaiHowbestLabelPrinterCo.,Ltd Date:12/10/2025

ZhuhaiHowbestLabelPrinterCo.,Ltd ProductSimilarityDeclaration Productname:ThermalBarcodePrinter,BarcodeLabelPrinter,Thermal LabelPrinter Modelname:GP-420D,GP-1120D,GP-1121D,GP-1122D,GP-1123D,GP- 1126D,GP-1127D,GP-1128D,GP-1129D,GP-1204B,GP-1214B,GP- 1224B,GP-1234B,GP-1244B,GP-1254B,GP-1264B,GP-1274B,GP- 1284B,GP-1294B,S-4120A,S-4121A,S-4122A,S-4123A,S-4124A,S-4125A,S- 4126A,S-4127A,S-4128A,S-4129A,GP-D424,GP-1320D,GP-1321D,GP- 1322D,GP-1323D,GP-1326D,GP-1327D,GP-1328D,GP-1329D,GP- 1204D,GP-1214D,GP-1234D,GP-1244D,GP-1254D,GP-1264D,GP- 1274D,GP-1284D,GP-1294D,S-4120A,S-4121A,S-4122A,S-4123A,S- 4124A,S-4125A,S-4126A,S-4127A,S-4128A,S-4129A FCCID:2BTKU-GP-420D We(ZhuhaiHowbestLabelPrinterCo.,Ltd)herebystatethatallthemodels areelectricalidenticalincludingthesamesoftwareparameterandhardware design(i.e.,circuitdesign,PCBLayout,RFmodule/circuit,antennatype(s) andantennalocation,componentsonPCB,etc.,),samemechanicalstructure anddesign(includingproductenclosure,materials,etc.,),onlythesales market,appearancecolor,andmodelnamearedifferent,therestarethe same. Signature: Printedname:ChengchengLi Title:Manager

ZhuhaiHowbestLabelPrinterCo.,Ltd 12/10/2025 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY-FCC FCCID:2BTKU-GP-420D PursuanttoSections0.457(d)(1)(ii)and0.459oftheCommission’sRulesandFCCGuidance document726920,weherebyrequestconfidentialtreatmentofinformationaccompanyingthis applicationasoutlinedbelow: PERMANENTLONG-TERMCONFIDENTIALITY: Schematics BlockDiagrams TheoryofOperation Theaboveinformationcontainstradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthisinformationmightbeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors.TheApplicantunderstandsthatpursuanttoRule 0.457(d)(1)(ii),disclosureofthisApplicationandallaccompanyingmaterialswillnotbemadebefore thedateoftheGrantforthisApplication. Sincerely, Signed: Printedname:ChengchengLi Title:Manager

FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D

FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D FCCID:2BTKU-GP-420D

ReportNo.:PTC25091213101E-FC03 Page1of7 FCCTESTREPORT FCCID:2BTKU-GP-420D Product: ThermalBarcodePrinter,BarcodeLabelPrinter,ThermalLabel Printer ModelName:GP-420D AdditionalModel:Seepage5 Brand:Gprinter ReportNo.:PTC25091213101E-FC03 Preparedfor ZhuhaiHowbestLabelPrinterCo.,Ltd 2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Preparedby PreciseTesting&CertificationCo.,Ltd. Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong,China. ReportNo.:PTC25091213101E-FC03 Page2of7 TESTRESULTCERTIFICATION Applicant’sname:ZhuhaiHowbestLabelPrinterCo.,Ltd Address:2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Manufacture'sname:ZhuhaiHowbestLabelPrinterCo.,Ltd Address:2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Productname:ThermalBarcodePrinter,BarcodeLabelPrinter,ThermalLabel Printer Modelname:GP-420D AdditionalModel:Seepage5 Testprocedure:FCCCFR47Part1.1307(b)(1) TestDate:September28,2025toOctober29,2025 DateofIssue:October29,2025 TestResult:PASS ThisdevicedescribedabovehasbeentestedbyPTC,andthetestresultsshowthatthe equipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditisapplicable onlytothetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofPTC,this documentmaybealteredorrevisedbyPTC,personalonly,andshallbenotedinthe revisionofthedocument. TestEngineer: Jackzhou/Engineer TechnicalManager: SimonPu/Manager ReportNo.:PTC25091213101E-FC03 Page3of7 Contents Page 2TESTSUMMARY...............................................................................................................................................4 3GENERALINFORMATION..............................................................................................................................5 3.1GENERALDESCRIPTIONOFE.U.T..........................................................................................................5 4RFEXPOSURE..................................................................................................................................................6 4.1REQUIREMENTS........................................................................................................................................6 4.2THEPROCEDURES/LIMIT........................................................................................................................6 4.3MPECALCULATIONMETHOD..................................................................................................................7 4.4TESTRESULT...........................................................................................................................................7 ReportNo.:PTC25091213101E-FC03 Page4of7 2TestSummary TestItemsTestRequirementResult MaximumPermissibleExposure (ExposureofHumanstoRFFields) 15.247(i)PASS Remark: N/A:NotApplicable ReportNo.:PTC25091213101E-FC03 Page5of7 3GeneralInformation 3.1GeneralDescriptionofE.U.T. ProductName:ThermalBarcodePrinter,BarcodeLabelPrinter,ThermalLabelPrinter Modelname:GP-420D Addtionalmodel: GP-1120D,GP-1121D,GP-1122D,GP-1123D,GP-1126D,GP-1127D,GP-1128D, GP-1129D,GP-1204B,GP-1214B,GP-1224B,GP-1234B,GP-1244B, GP-1254B,GP-1264B,GP-1274B,GP-1284B,GP-1294B,S-4120A,S-4121A, S-4122A,S-4123A,S-4124A,S-4125A,S-4126A,S-4127A,S-4128A,S-4129A, GP-D424,GP-1320D,GP-1321D,GP-1322D,GP-1323D,GP-1326D,GP-1327D, GP-1328D,GP-1329D,GP-1204D,GP-1214D,GP-1234D,GP-1244D, GP-1254D,GP-1264D,GP-1274D,GP-1284D,GP-1294D,S-4120A,S-4121A, S-4122A,S-4123A,S-4124A,S-4125A,S-4126A,S-4127A,S-4128A,S-4129A DifferencesDescription: Differencesbetweenmodels:onlythesalesmarket,appearancecolor,andmodel namearedifferent,therestarethesame. Specification:BluetoothBDR+EDR;BluetoothBLE OperationFrequency:2402-2480MHzforBT NumberofChannel: 79channelsforBDR+EDR 40channelsForDTS TypeofModulation: GFSKForDSS GFSKForDTS Antennainstallation:PCBantenna AntennaGain:4.85dBi Powersupply: Adapter:20202M-240250U Input:100-240V~50/60Hz1.5AMAX Output:24V ⎓ 2.5A HardwareVersion: N/A SoftwareVersion: N/A ReportNo.:PTC25091213101E-FC03 Page6of7 4RFExposure TestRequirement :FCCPart1.1307(b)(1) EvaluationMethod :KDB447498D01GeneralRFExposureGuidancev06 4.1Requirements Systemsoperatingundertheprovisionsofthissectionshallbeoperatedinamannerthatensuresthat thepublicisnotexposedtoradiofrequencyenergylevelsinexcesslimitformaximumpermissible exposure.Inaccordancewith47CFRFCCPart2SubpartJ,section2.1091thisdevicehasbeen definedasamobiledevicewherebyadistanceof0.2mnormallycanbemaintainedbetweentheuser andthedevice. 4.2Theprocedures/limit (A)LimitsforOccupational/ControlledExposure FrequencyRangeElectricFieldMagneticFieldPowerDensity(S)AveragingTime 0.3-3.06141.63(100)*6 3.0-301842/f4.89/f(900/f)*6 30-30061.40.1631.06 300-1500F/3006 1500-100,00056 (B)LimitsforGeneralPopulation/UncontrolledExposure FrequencyRangeElectricFieldMagneticFieldPowerDensity(S)AveragingTime 0.3-1.346141.63(100)*30 1.34-30824/f2.19/f(180/f)*30 30-30027.50.0730.230 300-1500F/150030 1500-100,0001.030 Note:f=frequencyinMHz;*Plane-waveequivalentpowerdensity ReportNo.:PTC25091213101E-FC03 Page7of7 4.3MPECalculationMethod E(V/m)＝ d GP30 PowerDensity:Pd(W/m²)＝ 377 2 E E ＝ Electricfield(V/m) P＝PeakRFoutputpower(W) G＝EUTAntennanumericgain(numeric) d ＝ Separationdistancebetweenradiatorandhumanbody(m) Theformulacanbechangedto Pd ＝ 2 377 30 d GP   θφ FromthepeakEUTRFoutputpower,theminimummobileseparationdistance,d=0.2m,aswellas thegainoftheusedantenna,theRFpowerdensitycanbeobtained 4.4TestResult Mode Antenna Gain (numeric) Max.Peak OutputPower (dBm) Tuneup tolerance (dBm) MaxTuneUp Power(mW) PowerDensity (mW/cm2) LimitofPower Density (mW/cm2) Result 2480(BLE)3.05-2.77-2.77±10.6652731560.0004043151Pass 2480(BDR)3.05-3.17-3.17±10.6067363300.0003687401Pass Conclusion ： 1.Calculateintheworst-casemode. 2.Max.TuneUpPowerisdeclaredbymanufacturer,andusedtocalculate. ******THEENDREPORT******

Antenna Datasheet Antenna Test Environment www.mesoonrf.cnPage 1 Antenna Outline Drawing www.mesoonrf.cnPage 2 Antenna Anechoic Chamber Test Data www.mesoonrf.cnPage 3 www.mesoonrf.cnPage 4 www.mesoonrf.cnPage 5 www.mesoonrf.cnPage 6 www.mesoonrf.cnPage 7 www.mesoonrf.cnPage 8 Shenzhen MesoonRF loT Technology.co.,Ltd 3/F, No. 10 Xinggong 1st Road, Xinggong Community, Yutang Subdistrict, Guangming District, Shenzhen, China Tel.+860755-23764945

ReportNo.:PTC25091213101E-FC01 Page1of59 FCCTESTREPORT FCCID:2BTKU-GP-420D Product: ThermalBarcodePrinter,BarcodeLabelPrinter,Thermal LabelPrinter ModelName: GP-420D AdditionalModel: Seepage7 Brand: Gprinter ReportNo.: PTC25091213101E-FC01 Preparedfor ZhuhaiHowbestLabelPrinterCo.,Ltd 2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Preparedby PreciseTesting&CertificationCo.,Ltd Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong,China ReportNo.:PTC25091213101E-FC01 Page2of59 1TESTRESULTCERTIFICATION Applicant’sname:ZhuhaiHowbestLabelPrinterCo.,Ltd Address:2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Manufacture'sname:ZhuhaiHowbestLabelPrinterCo.,Ltd Address:2/F,NO.168YileRoad,PingshaTown,Zhuhai,China Productname: ThermalBarcodePrinter,BarcodeLabelPrinter,ThermalLabelPrinter Modelname:GP-420D AdditionalModel:Seepage7 Standards:FCCCFR47Part15Section15.247 Testprocedure:ANSIC63.10-2020 TestDate:September28,2025toOctober29,2025 DateofIssue:October29,2025 TestResult:Pass ThisdevicedescribedabovehasbeentestedbyPTC,andthetestresultsshowthatthe equipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlyto thetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofPTC,thisdocument maybealteredorrevisedbyPTC,personalonly,andshallbenotedintherevisionofthedocument. TestEngineer: Jackzhou/Engineer TechnicalManager: SimonPu/Manager ReportNo.:PTC25091213101E-FC01 Page3of59 Contents Page 1TESTRESULTCERTIFICATION...............................................................................................................................2 2TESTSUMMARY..........................................................................................................................................................5 2.1TESTSITE............................................................................................................................................................6 3GENERALINFORMATION.......................................................................................................................................7 3.1GENERALDESCRIPTIONOFE.U.T.....................................................................................................................7 3.2CHANNELLIST.....................................................................................................................................................8 4EQUIPMENTDURINGTEST....................................................................................................................................9 4.1EQUIPMENTSLIST.............................................................................................................................................9 4.2MEASUREMENTUNCERTAINTY.........................................................................................................................12 4.3DESCRIPTIONOFSUPPORTUNITS...................................................................................................................13 5CONDUCTEDEMISSION..........................................................................................................................................14 5.1E.U.T.OPERATION............................................................................................................................................14 5.2EUTSETUP.......................................................................................................................................................14 5.3TESTSET-UP(BLOCKDIAGRAMOFCONFIGURATION).................................................................................15 5.4MEASUREMENTPROCEDURE............................................................................................................................15 5.5CONDUCTEDEMISSIONLIMIT...........................................................................................................................15 5.6MEASUREMENTRECEIVERPARAMETERS:.......................................................................................................16 5.7CONDUCTEDEMISSIONTESTRESULT.............................................................................................................16 6RADIATEDSPURIOUSEMISSIONS......................................................................................................................19 6.1EUTOPERATION...............................................................................................................................................19 6.2TESTSETUP......................................................................................................................................................20 6.3SPECTRUMANALYZERSETUP..........................................................................................................................21 6.4TESTPROCEDURE.............................................................................................................................................22 6.5SUMMARYOFTESTRESULTS...........................................................................................................................24 7CONDUCTBANDEDGEANDSPURIOUSEMISSIONSMEASUREMENT....................................................31 7.1TESTPROCEDURE.............................................................................................................................................31 7.2TESTSETUP......................................................................................................................................................31 7.3TESTRESULT....................................................................................................................................................32 ReportNo.:PTC25091213101E-FC01 Page4of59 86DBBANDWIDTHMEASUREMENT......................................................................................................................39 TESTPROCEDURE.................................................…

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FCCID:2BTKU-GP-420D ConductedEmission RadiatedSpuriousEmissions TestFrequencyFrom30MHz-1GHz FCCID:2BTKU-GP-420D TestfrequencyfromAbove1GHz