2BOLJ-HI-C1Visual Intraoral Camera

Hygiene Insight, Inc. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 16, 2026 Subject; Request for Confidentiality FCC ID: 2BOLJ-HI-C1 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. ☑ Schematic Diagram ☑Block Diagram ☑ Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); □ External Photos □ Test Setup Photos □ Internal Photos ☑ User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR ☑ For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Mr Rui Li Title:Manager

FCCID:2BOLJ-HI-C1 ExternalPhotosoftheEUT Fig.1 Fig.2 FCCID:2BOLJ-HI-C1 Fig.3 Fig.4 FCCID:2BOLJ-HI-C1 Fig.5 Fig.6

FCCID:2BOLJ-HI-C1 labelandlocation Fig.1 FCCID:2BOLJ-HI-C1 VisualIntraoralCamera Model:HI-C1 Input:DC5V YilianYike(Shenzhen)TechnologyCo.,Ltd 3.5mm 1.8mm

FCCID:2BOLJ-HI-C1 InternalPhotosoftheEUT Fig.1 Fig.2 BLE&WIFI Antenna FCCID:2BOLJ-HI-C1 Fig.3 Fig.4

ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. 101#,BuildingK&BuildingT,TheSecondIndustrialZone,JiazitangCommunity, FenghuangStreet,GuangmingDistrict,Shenzhen,China RFExposureevaluation ReportReferenceNo........................: FCCID.................................................: GRCTR251102013-03 2BOLJ-HI-C1 Compiledby (position+printedname+signature) .. : TestingEngineerJimmyWang Supervisedby (position+printedname+signature)..: ProjectEngineerKelleyZhang Approvedby (position+printedname+signature)..: ManagerZhihuiDeng Dateofissue ......................................... :Nov.18,2025 TestingLaboratoryName................:ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. Address.................................................: 101#,BuildingK&BuildingT,TheSecondIndustrialZone, JiazitangCommunity,FenghuangStreet,GuangmingDistrict, Shenzhen,China Applicant’sname ............................... :HygieneInsight,Inc. Address.................................................: 79MichaelWay,SantaClara,CA95051USA Testspecification..............................: Standard................................................: 47CFR§2.1093 KDB447498v06 ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerand sourceofthematerial.ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.takesno responsibilityforandwillnotassumeliabilityfordamagesresultingfromthereader'sinterpretationofthe reproducedmaterialduetoitsplacementandcontext. Testitemdescription........................:VisualIntraoralCamera TradeMark............................................: / Manufacturer.........................................: YilianYike(Shenzhen)TechnologyCo.,Ltd Model/Typereference.........................: HI-C1 ListedModels ...................................... : / HardwareVersion ............................... : V1.0 SoftwareVersion..................................: V1.0 Frequency..............................................From2402MHzto2480MHz Ratings...................................................:DC5VPoweredbyadapteror 3.7V600mAh(ByLi-ionrechargeablebattery) Result.....................................................:PASS ReportNo.:GRCTR251102013-03Page2of9 TESTREPORT EquipmentunderTest:VisualIntraoralCamera Model/Type:HI-C1 ListedModels:/ Applicant : HygieneInsight,Inc. Address: 79MichaelWay,SantaClara,CA95051USA Manufacturer : YilianYike(Shenzhen)TechnologyCo.,Ltd Address: 508,HuichaoTechnologyBuilding,No.12JinhaiRoad,Xixiang Street,Bao'anDistrict,Shenzhen TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:GRCTR251102013-03Page3of9 Contents 1.SUMMARY...............................................................................................................................................4 1.1.GeneralRemarks.........................................................................................................................................4 1.2.ProductDescription....................................................................................................................................4 1.3.EquipmentUnderTest................................................................................................................................4 1.4.ShortdescriptionoftheEquipmentunderTest(EUT)............................................................................5 1.5.Modifications................................................................................................................................................5 2.TESTENVIRONMENT.......................................................................................................................6 2.1.Addressofthetestlaboratory...................................................................................................................6 2.2.TestFacility..................................................................................................................................................6 2.3.Environmentalconditions...........................................................................................................................6 2.4.Statementofthemeasurementuncertainty.............................................................................................6 3.METHODOFMEASUREMENT.....................................................................................................8 3.1.ApplicableStandard....................................................................................................................................8 3.2.Requirement.................................................................................................................................................8 3.3.Manufacturingtolerance.............................................................................................................................8 4.EVALUATIONRESULT....................................................................................................................9 5.CONCLUSION........................................................................................................................................9 ReportNo.:GRCTR251102013-03Page4of9 1.SUMMARY 1.1.GeneralRemarks Dateofreceiptoftestsample:Nov.04,2025 Testingcommencedon:Nov.04,2025 Testingconcludedon: Nov.18,2025 1.2.ProductDescription ProductName: VisualIntraoralCamera Model/Typereference:HI-C1 ListedModels:/ Powersupply: DC5VPoweredbyadapteror 3.7V600mAh(ByLi-ionrechargeablebattery) testingsampleID: GRCTR251102013-1#(Engineersample), GRCTR251102013-2#(Normalsample) Bluetooth Supportedtype:BluetoothlowEnergy Modulation: GFSK Operationfrequency: 2402MHzto2480MHz Channelnumber:40 Channelseparation: 2MHz Antennatype:ChipAntenna Antennagain*(Su…

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Antennaspec FCCID:2BOLJ-HI-C1 1.AntennaDescription: AntennatypeChipAntenna ModelF0 Frequencyrange2400MHz~2484MHz ManufacturerDONGGUANGXIAOKEINDUSTRLES.CO.,LTD AddressNO.227,DONGCHENGSECTION,GUANDONGROAD, DONGCHENGSTREET,DONGGUANCITY,CHINA 2.AntennaPhoto: Unit:mm 3.AntennaEfficiencyandGain Frequency(MHz) Efficiency (dBi) Gain(dBi)Efficiency(%) 2400-4.161.9451.38% 2410-3.931.7845.31% 2420-3.662.0544.50% 2430-3.792.1332.13% 2440-3.642.5851.26% 2450-4.131.7037.63% 2460-3.941.4660.44% 2470-3.641.2236.63% 2480-3.661.5042.04% 2490-3.621.2462.45% 2500-3.540.7335.34% 4.AntennaRadiationPattern 2402MHz 2.58 dbi -1.88 dbi 64.94%

ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. 101#,BuildingK&BuildingT,TheSecondIndustrialZone,JiazitangCommunity, FenghuangStreet,GuangmingDistrict,Shenzhen,China FCCPART15SUBPARTCTESTREPORT FCCPART15.247 ReportReferenceNo........................: FCCID.................................................: GRCTR251102013-01 2BOLJ-HI-C1 Compiledby (position+printedname+signature) .. : TestingEngineerJimmyWang Supervisedby (position+printedname+signature)..: ProjectEngineerKelleyZhang Approvedby (position+printedname+signature)..: ManagerZhihuiDeng Dateofissue ......................................... :Nov.18,2025 TestingLaboratoryName................: ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. Address.................................................: 101#,BuildingK&BuildingT,TheSecondIndustrialZone,Jiazitang Community,FenghuangStreet,GuangmingDistrict,Shenzhen, China Applicant’sname ............................... : HygieneInsight,Inc. Address.................................................: 79MichaelWay,SantaClara,CA95051USA Testspecification .............................. : Standard................................................:FCCPart15.247 ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerand sourceofthematerial.ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.takesno responsibilityforandwillnotassumeliabilityfordamagesresultingfromthereader'sinterpretationofthe reproducedmaterialduetoitsplacementandcontext. Testitemdescription ........................ : VisualIntraoralCamera TradeMark ............................................ : / Manufacturer.........................................: YilianYike(Shenzhen)TechnologyCo.,Ltd Model/Typereference ......................... : HI-C1 ListedModels ...................................... : / FirmwareVersion.................................:V1.0 HardwareVersion ................................ :V1.0 Modulation ........................................... : GFSK Frequency.............................................. From2402MHzto2480MHz Ratings...................................................: DC5VPoweredbyadapteror 3.7V600mAh(ByLi-ionrechargeablebattery) Result.....................................................: PASS ReportNo.:GRCTR251102013-01Page 2 of 31 TESTREPORT EquipmentunderTest:VisualIntraoralCamera Model/Type:HI-C1 ListedModels:/ Applicant : HygieneInsight,Inc. Address: 79MichaelWay,SantaClara,CA95051USA Manufacturer : YilianYike(Shenzhen)TechnologyCo.,Ltd Address: 508,HuichaoTechnologyBuilding,No.12JinhaiRoad,Xixiang Street,Bao'anDistrict,Shenzhen TestResult : PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:GRCTR251102013-01Page 3 of 31 Contents 1TESTSTANDARDS..............................................................................................................................4 2SUMMARY.................................................................................................................................................5 2.1GeneralRemarks..........................................................................................................................................5 2.2ProductDescription.....................................................................................................................................5 2.3EquipmentUnderTest.................................................................................................................................5 2.4ShortdescriptionoftheEquipmentunderTest(EUT).............................................................................5 2.5EUTconfiguration.........................................................................................................................................5 2.6EUToperationmode.....................................................................................................................................6 2.7BlockDiagramofTestSetup.......................................................................................................................6 2.8RelatedSubmittal(s)/Grant(s)...................................................................................................................6 2.9Modifications.................................................................................................................................................6 3TESTENVIRONMENT........................................................................................................................7 3.1Addressofthetestlaboratory....................................................................................................................7 3.2TestFacility...................................................................................................................................................7 3.3Environmentalconditions............................................................................................................................7 3.4Summaryofmeasurementresults..............................................................................................................8 3.5Statementofthemeasurementuncertainty..............................................................................................8 3.6EquipmentsUsedduringtheTest..............................................................................................................9 4TESTCONDITIONSANDRESULTS.......................................................................................10 4.1ACPowerConductedEmission................................................................................................................10 4.2RadiatedEmissionsandBandEdge.....................................................................…

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ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. 101#,BuildingK&BuildingT,TheSecondIndustrialZone,JiazitangCommunity, FenghuangStreet,GuangmingDistrict,Shenzhen,China FCCPART15SUBPARTCTESTREPORT FCCPART15.247 ReportReferenceNo. ....................... : FCCID.................................................: GRCTR251102013-02 2BOLJ-HI-C1 Compiledby (position+printedname+signature)..: TestingEngineerJimmyWang Supervisedby (position+printedname+signature) .. : ProjectEngineerKelleyZhang Approvedby (position+printedname+signature)..: ManagerZhihuiDeng Dateofissue.........................................:Nov.18,2025 TestingLaboratoryName................:ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd. Address ................................................. : 101#,BuildingK&BuildingT,TheSecondIndustrialZone,Jiazitang Community,FenghuangStreet,GuangmingDistrict,Shenzhen,China Applicant’sname...............................:HygieneInsight,Inc. Address ................................................. : 79MichaelWay,SantaClara,CA95051USA Testspecification..............................: Standard ................................................ :FCCPart15.247 ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongastheShenzhen GUORENCertificationTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwill notassumeliabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription........................:VisualIntraoralCamera TradeMark............................................: / Manufacturer ......................................... : YilianYike(Shenzhen)TechnologyCo.,Ltd Model/Typereference ......................... : HI-C1 ListedModels......................................: / FirmwareVersion.................................: V1.0 HardwareVersion................................: V1.0 ModulationType..................................:DSSS/OFDM OperationFrequency .......................... :From2412-2462MHz Rating ..................................................... : DC5VPoweredbyadapteror 3.7V600mAh(ByLi-ionrechargeablebattery) Result ..................................................... :PASS ReportNo.:GRCTR251102013-02Page 2 of 35 TESTREPORT EquipmentunderTest:VisualIntraoralCamera Model/Type:HI-C1 ListedModels:/ Applicant : HygieneInsight,Inc. Address: 79MichaelWay,SantaClara,CA95051USA Manufacturer : YilianYike(Shenzhen)TechnologyCo.,Ltd Address: 508,HuichaoTechnologyBuilding,No.12JinhaiRoad,Xixiang Street,Bao'anDistrict,Shenzhen TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:GRCTR251102013-02Page 3 of 35 Contents 1TESTSTANDARDS..............................................................................................................................4 2SUMMARY.................................................................................................................................................5 2.1GeneralRemarks..........................................................................................................................................5 2.2ProductDescription.....................................................................................................................................5 2.3EquipmentUnderTest.................................................................................................................................5 2.4ShortdescriptionoftheEquipmentunderTest(EUT).............................................................................5 2.5EUToperationmode.....................................................................................................................................6 2.6BlockDiagramofTestSetup.......................................................................................................................6 2.7RelatedSubmittal(s)/Grant(s)...................................................................................................................6 2.8Modifications.................................................................................................................................................6 3TESTENVIRONMENT........................................................................................................................7 3.1Addressofthetestlaboratory....................................................................................................................7 3.2TestFacility...................................................................................................................................................7 3.3Environmentalconditions............................................................................................................................7 3.4TestDescription............................................................................................................................................7 3.5Statementofthemeasurementuncertainty..............................................................................................8 3.6EquipmentsUsedduringtheTest..............................................................................................................8 4TESTCONDITIONSANDRESULTS.......................................................................................10 4.1ACPowerConductedEmission................................................................................................................10 4.2RadiatedEmission......................................................................................................................................11 4.3MaximumConductedOutputPower..........................................................................…

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ReportNo.:GRCTR251102013-02Page 21 of 35 4.56dBBandwidth Limit Fordigitalmodulationsystems,theminimum6dBbandwidthshallbeatleast500kHz TestProcedure Thetransmitteroutputwasconnectedtothespectrumanalyzerthroughanattenuator.Thebandwidthofthe fundamentalfrequencywasmeasuredbyspectrumanalyzerwithRBW:1%-5%oftheEBWandVBW: 3*RBW.The6dBbandwidthisdefinedasthetotalspectrumthepowerofwhichishigherthanpeakpower minus6dB. TestConfiguration EUTSPECTRUM ANALYZER TestResults TypeChannel 6dBBandwidth (MHz) Limit(KHz)Result 802.11b 0111.240 ≥500Pass 0610.120 1111.200 802.11g 0116.080 ≥500Pass 0615.960 1116.080 802.11n(HT20) 0116.720 ≥500Pass 0616.440 1116.200 802.11n(HT40) 03 35.760 ≥500Pass 06 35.360 09 35.440 Note: 1)Measuredpeakpowerspectrumdensityatdifferencedatarateforeachmodeandrecordedworstcase foreachmode. 2)Testresultsincludingcableloss; 3)Worstcasedataat1MbpsatIEEE802.11b;6MbpsatIEEE802.11g;6.5MbpsatIEEE802.11nHT20; 13.5MbpsatIEEE802.11nHT40; Pleaserefertofollowingplots; ReportNo.:GRCTR251102013-02Page 22 of 35 802.11b802.11g CH01CH01 CH06CH06 CH11CH11 ReportNo.:GRCTR251102013-02Page 23 of 35 802.11n(HT20)802.11n(HT40) CH01CH03 CH06CH06 CH11CH09 ReportNo.:GRCTR251102013-02Page 24 of 35 4.6Out-of-bandEmissions Limit Inany100kHzbandwidthoutsidethefrequencybandinwhichthespreadspectrumordigitallymodulated intentionalradiatorisoperating,theradiofrequencypowerthatisproducedbytheintentionalradiatorshallbe atleast20dBbelowthatinthe100kHzbandwidthwithinthebandthatcontainsthehighestlevelofthe desiredpower,basedoneitheranRFcon-ductedoraradiatedmeasurement,pro-videdthetransmitter demonstratescompliancewiththepeakconductedpowerlimits.Ifthetransmittercom-plieswiththe conductedpowerlimitsbasedontheuseofRMSaveragingoveratimeinterval,aspermittedunder paragraph(b)(3)ofthissection,theattenuationrequiredunderthisparagraphshallbe30dBinsteadof20dB. Attenuationbelowthegenerallimitsspecifiedin§15.209(a)isnotrequired. TestProcedure ConnectthetransmitteroutputtospectrumanalyzerusingalowlossRFcable,andsetthespectrumanalyzer toRBW=100kHz,VBW=300kHz,peakdetector,andmaxhold.Measurementsutilizingthesesettingare madeofthein-bandreferencelevel,bandedgeandout-of-bandemissions. TestConfiguration EUT SPECTRUM ANALYZER TestResults Remark:Themeasurementfrequencyrangeisfrom30MHztothe10thharmonicofthefundamental frequency.Thelowest,middleandhighestchannelsaretestedtoverifythespuriousemissionsandbandage measurementdata.Andrecordtheworstdatainthereport. Thetestresultsincludingthecableloss+powerdividerloss. Testplotasfollows: ReportNo.:GRCTR251102013-02Page 25 of 35 802.11b CH01CH06 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 26 of 35 802.11b802.11g CH11CH01 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 27 of 35 802.11g CH06CH11 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 28 of 35 802.11n(HT20) CH01CH06 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 29 of 35 802.11n(HT20)802.11n(HT40) CH11CH03 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 30 of 35 802.11n(HT40) CH06CH09 30MHz-1GHz30MHz-1GHz 1GHz-25GHz1GHz-25GHz ReportNo.:GRCTR251102013-02Page 31 of 35 Band-edgeMeasurementsforRFConductedEmissions: 802.11b LeftbandedgeRightbandedge 802.11g LeftbandedgeRightbandedge ReportNo.:GRCTR251102013-02Page 32 of 35 802.11n(HT20) LeftbandedgeRightbandedge 802.11n(HT40) LeftbandedgeRightbandedge ReportNo.:GRCTR251102013-02Page 33 of 35 4.7AntennaRequirement StandardApplicable Forintentionaldevice,accordingtoFCC47CFRSection15.203: Anintentionalradiatorshallbedesignedtoensurethatnoantennaotherthanthatfurnishedbythe responsiblepartyshallbeusedwiththedevice.Theuseofapermanentlyattachedantennaorofanantenna thatusesauniquecouplingtotheintentionalradiator,themanufacturermaydesigntheunitsothatabroken antennacanbereplacedbytheuser,buttheuseofastandardantennajackorelectricalconnectoris prohibited. FCCCFRTitle47Part15SubpartCSection15.247(c)(1)(I): (i)Systemsoperatinginthe2400-2483.5MHzbandthatisusedexclusivelyforfixed.Point-to-pointoperations mayemploytransmittingantennaswithdirectionalgaingreaterthan6dBiprovidedthemaximumconducted outputpoweroftheintentionalradiatorisreducedby1dBforevery3dBthatthedirectionalgainofthe antennaexceeds6dBi. TestResult: Themaximumgainofantennawas2.58dBi. Remark:Theantennagainisprovidedbythecustomer,ifthedataprovidedbythecustomerisnotaccurate, ShenzhenGUORENCertificationTechnologyServiceCo.,Ltd.doesnotassumeanyresponsibility. ReportNo.:GRCTR251102013-02Page 34 of 35 5TestSetupPhotosoftheEUT ReportNo.:GRCTR251102013-02Page 35 of 35 6PhotosoftheEUT ReferencetothetestreportNo.GRCTR251102013-01. **********************EndofReport**********************

FCCID:2BOLJ-HI-C1 TestSetupPhotosoftheEUT TestSetupPhoto(s)ofRadiatedEmissionsMeasurement Fig.1 Fig.2 FCCID:2BOLJ-HI-C1 TestSetupPhoto(s)ofRFMeasurement Fig.4