2A2VU-VFS335Royyt+ Mini Body Fat Scale

VFS335-PUS VFS335-PUS FCC Statement Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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 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.

ShenzhenSubjectTechnologyCo.,Ltd. CoveredEquipmentCertificationAttestationLetter 12/22/2023 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2A2VU-VFS335 ShenzhenSubjectTechnologyCo.,Ltd.(“theapplicant”)certifiesthattheequipment forwhichauthorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. ShenzhenSubjectTechnologyCo.,Ltd.(“theapplicant”)certifiesthat,asofthedate ofthefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListasan entityproducing“covered”equipment. Signed: Printedname:LeslieChen Title:GeneralManager CompanyName:ShenzhenSubjectTechnologyCo.,Ltd. Date:12/22/2023

Shenzhen Subject Technology Co., Ltd. U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Baihetian Innovative Solutions FRN: 0033401605 Contact Name: Kenneth Young Street Address: 6837 Chase Rd City/Province/Zip: Dearborn, MI 48126 Telephone No: 313-395-3113 Email: [email protected] This letter is to confirm that we (Baihetian Innovative Solutions) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: Dec 22, 2023 Signed by (Printed Name/Title): Kenneth Young/Manager The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Subject Technology Co., Ltd. FRN: 0031266000 Grantee Code: 2A2VU Contact Name: Leslie Chen Street Address: 1004, Building 11, phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, City/Province/Zip: Shenzhen, China Telephone No: +86-755-28778676 Email: [email protected] Applicant Signature: Date:2023-12-22 Signed by (Printed Name/Title): Leslie Chen / General Manager FCC ID: 2A2VU-VFS335 Dec 2023

ShenzhenSubjectTechnologyCo.,Ltd. 2023-12-22 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointSHENZHENTONGCETESTINGLAB/2101&2201,Zhenchang FactoryRenshanIndustrialZone,FuhaiSubdistrict,Bao'anDistrict,Shenzhen,Guangdong, 518103,People'sRepublicofChina(NameofAgentcompanynameandaddress)toactas ouragentinthepreparationofthisapplicationforequipmentcertification.Icertifythat submitteddocumentsproperlydescribethedeviceorsystemforwhichequipment certificationissought.Ialsocertifythateachunitmanufactured,importedormarketed,as definedintheFederalCommunicationsCommission’sregulationswillhaveaffixedtoita labelidenticaltothatsubmittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf,Iack nowledgethatallresponsibilityforcomplyingwiththetermsandconditionsforcertification,stillres ideswithShenzhenSubjectTechnologyCo.,Ltd./1004,Building11,phaseII,Tianan YunguIndustrialPark,GangtouCommunity,BantianStreet,LonggangDistrict, Shenzhen,China(ApplicantNameandaddress) <Signature> Name:LeslieChen Title:GeneralManager ApplicantCompany:ShenzhenSubjectTechnologyCo.,Ltd.

ShenzhenSubjectTechnologyCo.,Ltd. 2023-12-22 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2A2VU-VFS335 ProductName:Royyt+MiniBodyFatScale RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: Schematics  Blockdiagram Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name:LeslieChen Title:GeneralManager Company:ShenzhenSubjectTechnologyCo.,Ltd.

ShenzhenSubjectTechnologyCo.,Ltd. 1004,Building11,phaseII,TiananYunguIndustrialPark,GangtouCommunity,BantianStreet,LonggangDistrict, Shenzhen,China Statement Product:Royyt+MiniBodyFatScale Model:VFS335-PUS AdditionalModel:VFS335-WUS Trademark:N/A WeherebystatethatVFS335-WUSistestedmodel,othermodelsarederivativemodels.Themodels areidenticalincircuitandPCBlayout,onlydifferentonthemodelnames.Sothetestdataof VFS335-WUScanrepresenttheremainingmodels. Yourassistanceonthismatterishighlyappreciated. Yourssincerely, Signature: Date:2023/12/22 Name:LeslieChen CompanyName:ShenzhenSubjectTechnologyCo.,Ltd. Address:1004,Building11,phaseII,TiananYunguIndustrialPark,GangtouCommunity, BantianStreet,LonggangDistrict,Shenzhen,China Tel/Fax:+86-755-28778676 E-Mail:[email protected]

Page 1 of 4 Appendix C: Photographs of EUT Product: Royyt+ Mini Body Fat Scale Model: VFS335-PUS External Photos Page 2 of 4 Page 3 of 4 Page 4 of 4

LabelArtworkandLocation Model:VFS335-PUS Label: Size:L*W=60*24mm Location

Page 1 of 2 Appendix C: Photographs of EUT Product: Royyt+ Mini Body Fat Scale Model: VFS335-PUS Internal Photos Page 2 of 2 Antenna

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2A2VU-VFS335 Test Report No. ............... : TCT231220E002 Date of issue ................... : Dec. 22, 2023 Testing laboratory .......... : SHENZHEN TONGCE TESTING LAB Testing location/ address: 2101 & 2201, Zhenchang Factory, Renshan Industrial Zone, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, 518103, People's Republic of China Applicant's name ............ : Shenzhen Subject Technology Co., Ltd. Address ........................... : 1004, Building 11, phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Manufacturer's name ... : Shenzhen Subject Technology Co., Ltd. Address ........................... : 1004, Building 11, phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Standard(s) ..................... : KDB 447498 D01 General RF Exposure Guidance v06 Product Name ................. : Royyt+ Mini Body Fat Scale Trade Mark ...................... : N/A Model/Type reference..... : VFS335-PUS, VFS335-WUS Rating(s).......................... : DC 3V(2*AAA Battery) Date of receipt of test item ......................................... : Dec. 20, 2023 Date (s) of performance of test ................................... : Dec. 20, 2023 - Dec. 22, 2023 Tested by (+signature) ... : Onnado YE Check by (+signature) .... : Beryl ZHAO Approved by (+signature): Tomsin General disclaimer: This report shall not be reproduced except in full, without the written approval of SHENZHEN TONGCE TESTING LAB. This document may be altered or revised by SHENZHEN TONGCE TESTING LAB personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample. Report No.: TCT231220E002 Page 2 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Table of Contents 1. General Product Information .................................................................. 3 1.1. EUT description ..................................................................................................... 3 1.2. Model(s) list ............................................................................................................ 3 2. General Information ................................................................................. 4 2.1. Test environment and mode ................................................................................. 4 2.2. Description of Support Units ................................................................................ 4 3. Facilities and Accreditations .................................................................. 5 3.1. Facilities ................................................................................................................. 5 3.2. Location ................................................................................................................. 5 4. Test Results and Measurement Data ..................................................... 6 Report No.: TCT231220E002 Page 3 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 1. General Product Information 1.1. EUT description Product Name ....................... : Royyt+ Mini Body Fat Scale Model/Type reference........... : VFS335-PUS Sample Number....................: TCT231220E001-0101 Operation Frequency ........... : 2402MHz~2480MHz Modulation Type ................... : GFSK Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 2.81dBi Rating(s)................................ : DC 3V(2*AAA Battery) Note: The antenna gain listed in this report is provided by applicant, and the test laboratory is not responsible for this parameter. 1.2. Model(s) list No. Model No. Tested with 1 VFS335-PUS Other models VFS335-WUS Note: VFS335-PUS is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names. So the test data of VFS335-PUS can represent the remaining models. Report No.: TCT231220E002 Page 4 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 2. General Information 2.1. Test environment and mode Item Normal condition Temperature +25ºC Voltage DC 3V Humidity 56% Atmospheric Pressure: 1008 mbar Test Mode: Engineering mode: Keep the EUT in continuous transmitting by select channel 2.2. Description of Support Units The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. Equipment Model No. Serial No. FCC ID Trade Name / / / / / Note: 1. All the equipment/cables were placed in the worst-case configuration to maximize the emission during the test. 2. Grounding was established in accordance with the manufacturer’s requirements and conditions for the intended use. 3. For conducted measurements (Output Power, 20dB Occupied Bandwidth, Carrier Frequencies Separation, Hopping Channel Number, Dwell Time, Spurious Emissions), the antenna of EUT is connected to the test equipment via temporary antenna connector, the antenna connector is soldered on the antenna port of EUT, and the temporary antenna connector is listed in the Test Instruments. Report No.: TCT231220E002 Page 5 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 3. Facilities and Accreditations 3.1. Facilities The test facility is recognized, certified, or accredited by the following organizations: ● FCC - Registration No.: 645098 SHENZHEN TONGCE TESTING LAB Designation Number: CN1205 The testing lab has been registered and fully described in a report with the (FCC) Federal Communications Commission. The accept…

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Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID ............................. : 2A2VU-VFS335 Test Report No. ............... : TCT231220E001 Date of issue ................... : Dec. 22, 2023 Testing laboratory .......... : SHENZHEN TONGCE TESTING LAB Testing location/ address: 2101 & 2201, Zhenchang Factory, Renshan Industrial Zone, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, 518103, People's Republic of China Applicant's name ............ : Shenzhen Subject Technology Co., Ltd. Address ........................... : 1004, Building 11, phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Manufacturer's name ... : Shenzhen Subject Technology Co., Ltd. Address ........................... : 1004, Building 11, phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Street, Longgang District, Shenzhen, China Standard(s) ..................... : FCC CFR Title 47 Part 15 Subpart C Section 15.247 FCC KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10:2013 Product Name ................. : Royyt+ Mini Body Fat Scale Trade Mark ...................... : N/A Model/Type reference..... : VFS335-PUS, VFS335-WUS Rating(s).......................... : DC 3V(2*AAA Battery) Date of receipt of test item ......................................... : Dec. 20, 2023 Date (s) of performance of test ................................... : Dec. 20, 2023 - Dec. 22, 2023 Tested by (+signature) ... : Onnado YE Check by (+signature) .... : Beryl ZHAO Approved by (+signature): Tomsin General disclaimer: This report shall not be reproduced except in full, without the written approval of SHENZHEN TONGCE TESTING LAB. This document may be altered or revised by SHENZHEN TONGCE TESTING LAB personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample. Report No.: TCT231220E001 Page 2 of 48 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Table of Contents 1. General Product Information .................................................................. 3 1.1. EUT description ..................................................................................................... 3 1.2. Model(s) list ............................................................................................................ 3 1.3. Operation Frequency ............................................................................................ 4 2. Test Result Summary .............................................................................. 5 3. General Information ................................................................................. 6 3.1. Test environment and mode ................................................................................. 6 3.2. Description of Support Units ................................................................................ 6 4. Facilities and Accreditations .................................................................. 7 4.1. Facilities ................................................................................................................. 7 4.2. Location ................................................................................................................. 7 4.3. Measurement Uncertainty ..................................................................................... 7 5. Test Results and Measurement Data ..................................................... 8 5.1. Antenna requirement ............................................................................................ 8 5.2. Conducted Emission ............................................................................................. 9 5.3. Conducted Output Power ................................................................................... 10 5.4. Emission Bandwidth ........................................................................................... 11 5.5. Power Spectral Density ....................................................................................... 12 5.6. Conducted Band Edge and Spurious Emission Measurement ....................... 13 5.7. Radiated Spurious Emission Measurement ...................................................... 15 Appendix A: Test Result of Conducted Test Appendix B: Photographs of Test Setup Appendix C: Photographs of EUT Report No.: TCT231220E001 Page 3 of 48 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 1. General Product Information 1.1. EUT description Product Name ....................... : Royyt+ Mini Body Fat Scale Model/Type reference........... : VFS335-PUS Sample Number....................: TCT231220E001-0101 Bluetooth Version ................ : V4.0 Operation Frequency ........... : 2402MHz~2480MHz Channel Separation .............. : 2MHz Data Rate ............................... : LE 1M PHY Number of Channel .............. : 40 Modulation Type ................... : GFSK Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 2.81dBi Rating(s)................................ : DC 3V(2*AAA Battery) Note: The antenna gain listed in this report is provided by applicant, and the test laboratory is not responsible for this parameter. 1.2. Model(s) list No. Model No. Tested with 1 VFS335-PUS Other models VFS335-WUS Note: VFS335-PUS is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names. So the test data of VFS335-PUS can represent the remaining models. Report No.: TCT231220E001 Page 4 of 48 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 1.3. Operation Frequency Channel Frequency Channel Frequency Channel Frequency Channel Frequency 0 2402MHz 10 2422MHz 20 2442MHz 30 2462MHz 1 2404MHz 11 2424MHz 21 2444MHz 31…

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1 ShenzhenDEWEIMACommunicationEquipmentCo.,Ltd SPECIFICATION SHEETFORAPPROVAL CUSTOMERNAME ShenzhenSubjectTechnologyCo.,Ltd. CUSTOMERP/N VFS335-PUS PARTNAME BTAntenna DWMNO. APPROVALREV. DWM-V1.0 CONTRACTORDATE：2023-07-02 QA CHECKED ME CHECKED RF CHECKED MANAGER CHECKED CUSTOMERDATE： ApprovedByCheckedByPreparedBy 2 Content 1.ProductApplication............................................................................................3 2.Thetestenvironment,equipment.......................................................................3 3.BTAntennadescription......................................................................................6 ProductSpecification P/N: BTAntenna Rev.: A Page: 3 / 10 3 1.ProductApplication TerminaloftheantennaproductscanonlybeusedforBTantenna. 2.Thetestenvironment,equipment ItemDescriptionTestConditionRequirement 2.1 Passivetesting TheVSWRmeasurementdevicesare connectedinsequence:Agilent5071B NetworkAnalyzer→measurementCable→ Customer-providingDevices. VSWR： 2400-2500MHz ≤ 2 Testequipment ItemDescriptionTestCondition 2.2 Activetest Theantennaistestedwithinthecellmainboardprovidedbyclients. Followpictureshowsthemeasurementconditionoftheantenna beenputonthemeasurementdevice,whichisusedforall measurementofelectricperformances. 2.3 Microwave Testequipment ProductSpecification P/N: BTAntenna Rev.: A Page: 4 / 10 4 Anechoic chamber （Satimo&ETS ） ProductSpecification P/N: BTAntenna Rev.: A Page: 5 / 10 5 2.4 CMW500 Agilent5071B AgilentE4405B Agilent8960 ProductSpecification P/N: BTAntenna Rev.: A Page: 6 / 10 6 3.BTAntennadescription 3.1BTTechnologyParameters BTFrequencyRange：2400MHz-2500MHz BTantennatype：IFAAntenna（PCBAntenna） OperatingHumidity：90%R.H.MAX TemperatureRating：0°C～+40°C 3.2BTmatchingcircuit 3.3BTantennaposition 3.4BTVSWR/ReturnLoss/Smith: ElementValue E1(0402)NC E2(0402)1.2nH E3(0402)NC Parameternotchanged ProductSpecification P/N: BTAntenna Rev.: A Page: 7 / 10 7 3.5BTEfficiencyAndGain: 3.6.BT3DPattern 2400MHz ProductSpecification P/N: BTAntenna Rev.: A Page: 8 / 10 8 2450MHz 2500MHz ProductSpecification P/N: BTAntenna Rev.: A Page: 9 / 10 9 3.7BTEngineeringdrawings： 10

Page 1 of 1 Appendix B: Photographs of Test Setup Product: Royyt+ Mini Body Fat Scale Model: VFS335-PUS Radiated Emission