2BKU5-SBDV0108VELIA ring

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Date: 09/11/2025 Attestation Letter FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: Our product VELIA ring, Model: US8, FCC ID: 2BKU5-SBDV0108. For use in America, this product only support BLE 1M&2M. The other functions, bands and modes has been shielded by the manufacturer using the software, the end user has no capability to activate it. Sincerely Yours, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Date:09/11/2025 Attestation Letter FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 § 2.911(d)(5)(i) Filing FCC ID: 2BKU5-SBDV0108 Senbiosys SA certifies that the equipment for which authorization is sought, is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely Yours, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer CFR 47 §2.911(d)(5)(i) Attestation Letter

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Attestation Letter Date:09/11/2025 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 § 2.911(d)(5)(ii) Filing FCC ID:2BKU5-SBDV0108 Senbiosys S A certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing“covered” equipment. And our product does not use Kaspersky software information. Sincerely Yours, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer CFR 47 §2.911 (d)(5)(ii) Attestation Letter

U.S. AGENT LETTER OF ATTESTATION Date: 09/08/2025 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 R ef: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: 2BKU5-SBDV0108 Senbiosys SA certifies that, as of the date of the filing of the application, Iconsigh Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. Senbiosys SA accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Iconsigh Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FC C ID. Designated U.S. Agent Information: Company Name: Iconsigh Inc. Address: 2310 Homestead Road, Suite C1, Los Altos, CA, 94024, USA FRN: 0033398652 Tel.: +1 (408) 320-9867 Email: [email protected] Signed by (printed name): Benjamin Kaur Signature: Applicant: Senbiosys SA Address: Route des Gouttes-d'Or 40, Neuchatel, 2000, Switzerland FRN: 0035910868 Tel: +41783060810 Email: [email protected] Signed by (printed name): Mr Antonino Caizzone Signature:

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] QA-FR-170-B 7/29/2014 FCC Authorization Date: 09/11/2025 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, Senbiosys SA the undersigned, hereby authorizes Bay Area Compliance Laboratories Corp. (Shenzhen) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. (Shenzhen) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] FCC Confidential Authorization Date: 09/11/2025 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2BKU5-SBDV0108 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Senbiosys SA hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description • Part list As well as short-term confidential treatment of information accompanying this application for a period of 180 days after grant is issued as outlined below: • Internal Photos • User’s Manual • External Photos • Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Date: 09/11/2025 Product Similarity Declaration FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: We, Senbiosys SA, hereby declare that we have a product named as VELIA ring, Model: US8, FCC ID: 2BKU5-SBDV0108 was tested by Bay Area Compliance Laboratories Corp. (Shenzhen). The device has difference appearance color design. The difference between them just only appearance color, other is the same. We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer

Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Date: 09/11/2025 FCC certification No. Cover Letter We, Senbiosys SA, hereby submit justification for placing the FCC certification No. in the associated user’s manual and packaging. According to the FCC regulation, the FCC certification No. should be printed on the VELIA ring, but as the VELIA ring is too small to print the label (FCC ID:2BKU5-SBDV0108), it will be moved to the user’s manual and packaging. The details are as below: A. Side surface (A): The side surface does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. B. Top cover (B): The top cover does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. Conclusion: Based on the above description of area A to B, we conclude that the device is unquestionably too small for enabling the FCC certification No. to be printed onto any surface. We therefore request to move the FCC certification No. to the user’s manual and packaging. Senbiosys SA Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Tel: +41783060810 Email: [email protected] Label and Label location: Best regards, Signature: Print Name: Mr Antonino Caizzone Title: Chief Engineering & Operations Officer

Label & Location Due to product size restrictions, FCC ID and IC ID are printed on the packaging and included in the user manual. HVIN is laser-engraved directly onto the inner shell of the product. US8

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501W72800E-RF TR-EM-RF011 Page 68 of 74 Version 4.1 RF EXPOSURE EVALUATION SAR-BASED EXEMPTION Applicable Standard According to FCC §2.1093 and §1.1307(b)(3)(i)(B) According to KDB 447498 D04 Interim General RF Exposure Guidance v01 This exemption is applicable to the frequency range between 300 MHz and 6 GHz, with test separation distances between 0.5 cm and 40 cm, and for all RF sources in fixed, mobile, and portable device exposure conditions. Accordingly, a RF source is considered an RF exempt device if its available maximum time averaged (matched conducted) power or its effective radiated power (ERP), whichever is greater, are below a specified threshold. This exemption threshold was derived based on general population 1-g SAR requirements and is detailed in Appendix C. Either SAR-based or MPE-based exemption may be considered for test exemption for fixed, mobile, or portable device exposure conditions; therefore, the contributions from each exemption in conjunction with the measured SAR (Evaluated term) shall be used to determine exemption for simultaneous transmission according to Formula (C.1) [repeated from § 1.1307(b)(3)(ii)(B)]. SAR-based thresholds are derived based on frequency, power, and separation distance of the RF source. The formula defines the thresholds in general for either available maximum time averaged power or maximum time-averaged ERP, whichever is greater. If the ERP of a device is not easily determined, such as for a portable device with a small form factor, the applicant may use the available maximum time-averaged power exclusively if the device antenna or radiating structure does not exceed an electrical length of λ/4. As for devices with antennas of length greater than λ/4 where the gain is not well defined, but always less than that of a half-wave dipole (length λ/2), the available maximum time-averaged power generated by the device may be used in place of the maximum time-averaged ERP, where that value is not known. The separation distance is the smallest distance from any part of the antenna or radiating structure for all persons, during operation at the applicable ERP. In the case of mobile or portable devices, the separation distance is from the outer housing of the device where it is closest to the antenna. The SAR-based exemption formula of § 1.1307(b)(3)(i)(B), repeated here as Formula (B.2), applies for single fixed, mobile, and portable RF sources with available maximum time-averaged power or effective radiated power (ERP), whichever is greater, of less than or equal to the threshold Pth (mW). This method shall only be used at separation distances from 0.5 cm to 40 cm and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by Formula (B.2). Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501W72800E-RF TR-EM-RF011 Page 69 of 74 Version 4.1 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501W72800E-RF TR-EM-RF011 Page 70 of 74 Version 4.1 Measurement Result For worst case: The Greater of Conducted Power Radio Frequency (MHz) Distance (mm) P th (mW) Maximum Conducted Power including Tune-up Tolerance (dBm) Antenna Gain (dBi) dBmmW BLE2402-2480 52.72-3-4.19-30.5 Note: Max tune-up conducted power # and antenna gain # was declared and provided by the applicant Result: Compliant

Freq(MHz) Max.Ave.Freq(MHz) Max.Ave.Freq(MHz) Max.Ave. 2400-5.57-9.202400-5.50-9.262400-4.19-6.63 2450-7.26-10.622450-7.26-10.722450-5.35-8.09 2500-8.97-12.282500-8.85-12.342500-7.05-10.04 Antenna type:Antenna Type: Metal outer shell Antenna Antenna Size：OD 24.19mm Model: US12 ANT Manufacturer：DONGGUAN AITE PRECISION HARDWARE FITTINGS CO., LTD.//Room 101, Building 9, No. 198 Xiegang Zhenxing Avenue, Xiegang Town, Dongguan City, Guangdong Province, China 1、Free Space 2、Hand Model Product placement method 2D field pattern diagram S11 X Z Y Efficiency performance Z Z Y X X Y Freq(MHz)Gain(dBi)Efficiency(%) 2400-4.19 16.82 2410-4.33 16.35 2420-4.39 15.67 2430-4.68 14.76 2440-5.00 13.41 2450-5.35 12.06 2460-5.56 11.36 2470-5.91 10.54 2480-6.27 9.62 2490-6.64 8.71 2500-7.05 8.05 Product placement method X Z Y confidential confidential confidential Freq(MHz) Max.Ave.Freq(MHz) Max.Ave.Freq(MHz) Max.Ave. 2400-5.98-12.322400-5.44-13.362400-4.45-10.13 2450-8.32-13.722450-5.58-14.272450-8.79-12.19 2500-11.11-15.512500-7.82-15.952500-10.75-14.36 3、 Summary ANT(Free Space)ANT(Hand Model) Maximum Efficiency(%)16.828.71 Maximum Gain(dBi)-4.19-4.45 2D field pattern diagram S11 Efficiency performance Z Z Y X X Y Freq(MHz)Gain(dBi)Efficiency(%) 2400-4.45 8.71 2410-4.36 8.43 2420-4.57 8.02 2430-4.77 7.45 2440-5.12 6.66 2450-5.58 5.94 2460-5.87 5.50 2470-6.31 5.00 2480-6.76 4.51 2490-7.29 4.02 2500-7.82 3.60

Note: The information marked # is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. This report must not be used by the customer to claim product certification, approval, or endorsement by NVLAP or any agency of the U.S. Government. This report may contain data that are not covered by the NVLAP accreditation and are marked with an asterisk “▼”. Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn TR-EM-RF011 Page 1 of 74 Version 4.1 TEST REPORT Applicant Name:Senbiosys SA Address:Route des Gouttes-d'Or 40, 2000 Neuchâtel, Switzerland Report Number:2501W72800E-RF FCC ID:2BKU5-SBDV0108 IC:33088-SBDV0108 Test Standard (s) FCC PART 15.247; RSS-GEN ISSUE 5, FEBRUARY 2021 AMENDMENT 2; RSS-247 ISSUE 3, AUGUST 2023 Sample Description Product Type:VELIA ring Model No.:US8 Multiple Model(s) No.:N/A Trade Mark:VELIA Date Received:2025/08/05 Issue Date:2025/09/18 Test Result:Pass ▲ ▲ In the configuration tested, the EUT complied with the standards above. Prepared and Checked By:Approved By: Ruby HuangNancy Wang RF EngineerRF Supervisor Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501W72800E-RF TR-EM-RF011 Page 2 of 74 Version 4.1 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ..........................................................................................................................3 GENERAL INFORMATION ........................................................................................................................................4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT)......................................................................................4 OBJECTIVE ....................................................................................................................................................................4 TEST METHODOLOGY....................................................................................................................................................4 MEASUREMENT UNCERTAINTY .....................................................................................................................................5 TEST FACILITY ..............................................................................................................................................................5 SYSTEM TEST CONFIGURATION ...........................................................................................................................6 SUMMARY OF TEST RESULTS ................................................................................................................................8 TEST EQUIPMENT LIST ............................................................................................................................................9 REQUIREMENTS AND TEST PROCEDURES ......................................................................................................10 UNWANTED EMISSION FREQUENCIES AND RESTRICTED BANDS .................................................................................10 99% OCCUPIED BANDWIDTH & 6 DB EMISSION BANDWIDTH ....................................................................................13 PEAK OUTPUT POWER MEASUREMENT .......................................................................................................................16 POWER SPECTRAL DENSITY ........................................................................................................................................18 100 KHZ BANDWIDTH OF FREQUENCY BAND EDGE....................................................................................................20 CONDUCTED SPURIOUS EMISSION...............................................................................................................................22 DUTY CYCLE ...............................................................................................................................................................24 ANTENNA REQUIREMENT .....................................................................................................................................25 TEST DATA AND RESULTS .....................................................................................................................................26 UNWANTED EMISSION FREQUENCIES AND RESTRICTED BANDS .................................................................................26 6DB EMISSION BANDWIDTH........................................................................................................................................56 99% OCCUPIED BANDWIDTH ......................................................................................................................................58 MAXIMUM CONDUCTED OUTPUT POWER ...................................................................................................................60 POWER SPECTRAL DENSITY ........................................................................................................................................62 100 KHZ BANDWIDTH OF FREQUENCY BAND EDGE....................................................................................................64 DUTY CYCLE .............................................................................................................…

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