2A2VU-2-VFS445Royyt+Air Smart Body Fat Scale

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: Feb 27, 2026 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. Grantee Code: 2A2VU FRN: 0031266000 FCC ID: 2A2VU-2-VFS445 Contact Name: Yanfei Sun Street Address: 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, City/Province/Zip: Shenzhen, China Telephone No: +8618129820148 Email: [email protected] Applicant Signature: Date:2026-02-25 Signed by (Printed Name/Title): Yanfei Sun / General Manager Feb 2026

Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Attestation Statements Not Covered EntityApplicant &Not Covered Equipment To: Federal Communications CommissionDate: Feb. 25, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i)& (ii) FCC ID: 2A2VU-2-VFS445 Shenzhen Subject Technology Co., Ltd.(“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to§ 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section§ 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: Yanfei Sun Title: General Manager Address: 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Tel.: +8618129820148 Email: [email protected]

Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China 1| Page Attestation Statements To: Federal Communications CommissionDate: Feb. 25, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: 2A2VU-2-VFS445 Product Name: Royyt+Air Smart Body Fat Scale This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1.Doe s not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2.Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendixevaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, App licant Signature Printed Name: Yanfei Sun Title: General Manager Address: 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Tel.: +8618129820148 Email: [email protected] Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China 2| Page Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☑ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. Compliance ☑ The Memory used is limited to run the Cybersecurity or anti-virus software. Compliance □ There is storage capacitylimitation for store or install the Cybersecurity or anti-virus software. Compliance ☑ Operatingsystem used is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check ☑

Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China 02.25.2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: 2A2VU-2-VFS445 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby requestpermanent confidential treatment of the exhibits accompanying thiscertification application as outlined below :  Block Diagram Schematics  Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180)days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOMin the event information regarding the product or the product is made available to the public before the requested period has expired. User Manual  Internal Photos  External Photos  Test Setup Photos Sincerely, (Signature) Printed Name: Yanfei Sun Title: General Manager Address: 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub- District, Longgang District, Shenzhen, China Tel.: +8618129820148 Email: [email protected]

Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu, Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China (02.25.2026) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2A2VU-2-VFS445 I, the undersigned, hereby authorize (SHENZHEN TONGCE TESTING LAB) to act on our behalfin all matters relating to this application for equipment certification. Any act carried out by (SHENZHEN TONGCE TESTING LAB) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with (Shenzhen Subject Technology Co., Ltd.). We certify that we are not subject to a denial of federal benefits that includes FCC benefitspursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no partyto the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) Name: Yanfei Sun Title: General Manager Tel.: +8618129820148 Fax: N/A Email: [email protected]

Shenzhen Subject Technology Co., Ltd. 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Statement Product: Royyt+Air Smart Body Fat Scale Model: VFS445 Additional Model: VFS445-WUS, VFS445-KGB, VFS445-PGB, VFS445-UGB, VFS445-WGB Trademark : N/A We hereby state that VFS445WUS is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names and colors. So the test data of VFS445WUS can represent the remaining models. Your assistance on this matter is highly appreciated. Yours sincerely, Signature: Date: 2026/02/25 Name: Yanfei Sun Company Name: Shenzhen Subject Technology Co., Ltd. Address: 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Tel / Fax: +8618129820148/N/A E-Mail: [email protected]

LabelArtworkandLocation Model:VFS445 Label: Size:L*W=70*40mm Royyt+AirSmartBodyFatScale Model:VFS445 FCCID:2A2VU-2-VFS445 Thisdevicecomplieswithpart15oftheFCC rules.Operationissubjecttothefollowingtwo conditions(1)thisdevicemaynotcauseharmful interference,and(2)thisdevicemustacceptany interferencereceived,includinginterferencethat maycauseundesiredoperation. Location

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2A2VU-2-VFS445 Test Report No. ............... : TCT260205E007 Date of issue ................... : Feb. 11, 2026 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 ........................... : 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Manufacturer's name ... : Shenzhen Subject Technology Co., Ltd. Address ........................... : 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Standard(s) ..................... : KDB 447498 D01 General RF Exposure Guidance v06 FCC CFR Title 47 Part 2.1093 Product Name ................. : Royyt+Air Smart Body Fat Scale Trade Mark ...................... : N/A Model/Type reference..... : VFS445, VFS445-WUS, VFS445-KGB, VFS445-PGB, VFS445-UGB, VFS445-WGB Rating(s).......................... : Battery DC 4.5V(AAA*3) Date of receipt of test item ......................................... : Feb. 05, 2026 Date (s) of performance of test ................................... : Feb. 05, 2026 ~ Feb. 11, 2026 Tested by (+signature) ... : Aaron MO 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.: TCT260205E007 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.: TCT260205E007 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+Air Smart Body Fat Scale Model/Type reference........... : VFS445 Sample Number....................: TCT260205E006-0101 Operation Frequency ........... : 2402MHz~2480MHz Modulation Type ................... : GFSK Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 1.28dBi Rating(s)................................ : Battery DC 4.5V(AAA*3) 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 VFS445 Other models VFS445-WUS, VFS445-KGB, VFS445-PGB, VFS445-UGB, VFS445-WGB Note: VFS445 is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names and colors. So the test data of VFS445 can represent the remaining models. Report No.: TCT260205E007 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 4.5V 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.: TCT260205E007 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 Nu…

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1 ShenzhenDEWEIMACommunicationEquipmentCo.,Ltd SPECIFICATION SHEETFORAPPROVAL CUSTOMERNAME ShenzhenuniqueScalesCo.,Ltd CUSTOMERP/N CF655BLE-X02（VFS445） PARTNAME BTAntenna DWMNO. APPROVALREV. DWM-V1.0 CONTRACTORDATE ： 2026-01-18 QA CHECKED ME CHECKED RF CHECKED MANAGER CHECKED CUSTOMERDATE： ApprovedByCheckedByPreparedBy 2 1.ProductApplication TerminaloftheantennaproductscanonlybeusedforBTantenna. 2.Thetestequipment 3.BTAntennadescription 3.1BTTechnologyParameters BTFrequencyRange：2400MHz-2500MHz BTantennatype：PCB Model：NA Manufacture：JiangxiXinmandaCircuitCo.,Ltd OperatingHumidity：85%R.H.MAX TemperatureRating：5°C～+40°C 3.2BTmatchingcircuit ElementValue E1(0402)1.0PF E2(0402) 0 Ω E3(0402)NC ProductSpecification P/N: BTAntenna Rev.: A Page: 3 / 6 3 3.3BTantennaposition 3.4BTVSWR/ReturnLoss/Smith: ProductSpecification P/N: BTAntenna Rev.: A Page: 4 / 6 4 3.5BTEfficiencyAndGain: 3.6.BT3DPattern 2400MHz ProductSpecification P/N: BTAntenna Rev.: A Page: 5 / 6 5 2450MHz 2500MHz 3.7BTEngineeringdrawings： PCBon-boardantenna 6

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2A2VU-2-VFS445 Test Report No. ............... : TCT260205E006 Date of issue ................... : Feb. 11, 2026 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 ........................... : 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, Longgang District, Shenzhen, China Manufacturer's name ... : Shenzhen Subject Technology Co., Ltd. Address ........................... : 705, Building 11, Phase II, Tianan Yungu Industrial Park, Gangtou Community, Bantian Sub-District, 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 C63.10:2020 Product Name ................. : Royyt+Air Smart Body Fat Scale Trade Mark ...................... : N/A Model/Type reference..... : VFS445, VFS445-WUS, VFS445-KGB, VFS445-PGB, VFS445-UGB, VFS445-WGB Rating(s).......................... : Battery DC 4.5V(AAA*3) Date of receipt of test item ......................................... : Feb. 05, 2026 Date (s) of performance of test ................................... : Feb. 05, 2026 ~ Feb. 11, 2026 Tested by (+signature) ... : Aaron MO 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.: TCT260205E006 Page 2 of 44 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 ............................................................................................ 3 2. Test Result Summary .............................................................................. 4 3. General Information ................................................................................. 5 3.1. Test environment and mode ................................................................................. 5 3.2. Description of Support Units ................................................................................ 5 4. Facilities and Accreditations .................................................................. 6 4.1. Facilities ................................................................................................................. 6 4.2. Location ................................................................................................................. 6 5. Measurement Uncertainty ....................................................................... 6 6. Test Results and Measurement Data ..................................................... 7 6.1. Antenna requirement ............................................................................................ 7 6.2. Conducted Emission ............................................................................................. 8 6.3. Conducted Output Power ..................................................................................... 9 6.4. Emission Bandwidth ........................................................................................... 10 6.5. Power Spectral Density ....................................................................................... 11 6.6. Conducted Band Edge and Spurious Emission Measurement ....................... 12 6.7. Radiated Spurious Emission Measurement ...................................................... 14 Appendix A: Test Result of Conducted Test Appendix B: Photographs of Test Setup Appendix C: Photographs of EUT Report No.: TCT260205E006 Page 3 of 44 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+Air Smart Body Fat Scale Model/Type reference........... : VFS445 Sample Number....................: TCT260205E006-0101 Bluetooth Version ................ : V5.1 Operation Frequency ........... : 2402MHz~2480MHz Channel Separation ............. : 2MHz Number of Channel .............. : 40 Modulation Type ................... : GFSK Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 1.28dBi Rating(s)................................ : Battery DC 4.5V(AAA*3) 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 VFS445 Other models VFS445-WUS, VFS445-KGB, VFS445-PGB, VFS445-UGB, VFS445-WGB Note: VFS445 is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names and colors. So the test data of VFS445 can represent the remaining models. 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 2464MHz ... ... ... ... ... ... ... ... 8 2418MHz 18 2438MHz 28 2458MHz 38 2478MHz 9 …

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