2BUC4-RING0001ring

Guangzhouxingguangbiaoyeyouxiangongsi Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [January 13, 2026] U.S. Agent Designation [Guangzhouxingguangbiaoyeyouxiangongsi] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought FCC ID: 2BUC4-RING0001 Name and company of U.S. agent: [GLOCERTS TECHNOLOGY INC] Physical U.S. address of agent: [19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507] FRN of U.S. agent: [0036339737] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: (626) 588-8039 [GLOCERTS TECHNOLOGY INC] acknowledges their obligation to accept service of process on behalf of [Guangzhouxingguangbiaoyeyouxiangongsi]. [Guangzhouxingguangbiaoyeyouxiangongsi] with the FRN [0037864378] accepts its obligation to maintain an agent for service of process in the United States for no less than 1 year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature Signature [XiZhen Zhou] [Huiying Fan] [General manager] [Director] [Guangzhouxingguangbiaoyeyouxiangongsi] [GLOCERTS TECHNOLOGY INC]

guangzhouxingguangbiaoyeyouxiangongsi (January 13, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID:2BUC4-RING0001 [guangzhouxingguangbiaoyeyouxiangongsi] (“the applicant”) 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name)XiZhen Zhou guangzhouxingguangbiaoyeyouxiangongsi (January 13, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID:2BUC4-RING0001 [guangzhouxingguangbiaoyeyouxiangongsi] (“the applicant”) 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. Sincerely, (Applicant signature) (Applicant printed name)XiZhen Zhou

guangzhouxingguangbiaoyeyouxiangongsi (January 13, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (ring / ring 0001 / FCC ID: 2BUC4- RING0001 ) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: XiZhen Zhou Title: General manager

guangzhouxingguangbiaoyeyouxiangongsi (January 13, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name: XiZhen Zhou Title: General manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 5 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 5 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 5 Model: ring 0001 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 5 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 5

FCC ID LABEL: Label Location: FCC ID: 2BUC4-RING0001

Shenzhen CTB Testing Co., Ltd. FCC ID:2BUC4-RING0001 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHZ)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f(GHZ) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BLE: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 0.658 1.160±11.001.26<50.390233.00YES 2.441 1.582 1.441±12.001.58<50.495243.00YES 2.480 1.41 1.381±12.001.58<50.499183.00YES GFSK Conclusion: For the max result : 0.49918≤ FCC Limit 3.0 for 1g SAR.

ARTNo: PAGE1 OF 5 客户确认签章(APPROVED SIGNATURE) 产品规格承认书 SPECIFICATIONS 客户: CUSTOMER: 产品名称: 双极天线 DESCRIPTION: 客户型号: CKH2012MA02 CUSTOMER PART NO: 产品型号: OUR MODEL NO: 日期: DATE:2020/12/22 确认签字,盖章后请返回承认书一份 PLEASE RETURN TO US ONE COPY OF “SPECIFICATION FOR APPROVAL” WITH YOUR APPROVED SIGNATURES 王 核准 海 审核刘飞制作刘小美 Shenzhen Chuangkehua Technology Co., Ltd. PAGE 2 OF5 CKH2012MA02 Specification OperatingTemp.:-40°C~+85°C 1. FEATURES : ●Lightweight,compact ●Widebandwidth,lowcost ●Built-inantennawithhighgain 2. APPLICATIONS : ●Bluetooth,WirelessLAN,MobileTV ●HomeRFSystem,etc 3.PRODUCTIDENTIFICATION CHIP012 221 (1)(2)(3) (1)Producttype:MultilayerchipAntenna (2)ExternalDimensions(L×W)(mm):2.0*1.2 4.SHAPEANDDIMENSIONS: SHAPEANDDIMENSIONS LWHA 2.0±0.21.2±0.20.55±0.10.4±0.1 UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ HOLEDIA＝ANGLES＝±± SCALE：N/AUNIT：mm T DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD DOCUMENT NO TITLE：CHIP2450-21Specification . SPECREV 2012 . P1 PAGE 3 OF5 TERMINAL-CONFIGURATION EVALUATIONBOARD APPLICATIONGUIDE UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ HOLEDIA＝ANGLES＝ ±± SCALE：N/ AUNIT：mm T DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD DOCUMENT NO TITLE：CHIP2450-21Specification . SPECREV 2012 . P1 PAGE 4 OF5 5.SPECIFICATIONS: ITEMSPECIFICATION FrequencyBand2400MHz～2483MHz VSWRLessthan3 PolarizationLinear *PeakGain2.48dBiTyp. *PeakEfficiency72.6%Typ. Impedance50ΩTyp. *Testcondition:Testboardsize98*65mm Matchingcircuit:Pimatchingcircuitwillberequired 6.ElectricalCharacteristics: VSWR Fr 2 2 2 UNLESSOTHERSPECIFIEDTOLERANCESON： X＝ ± X.X＝ ± X.XX＝ HOLEDIA＝ANGLES＝±± SCALE：N/AUNIT：mm T DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD DOCUMENT NO TITLE：CHIP2450-21Specification . SPECREV 2012 . P1 M M a a r r k kFre e q qu u e e n n c c y yV V S SW W R R 2 1 1 4 4 0 0 0 0M MH H z z 3 3 . . 0 0 4 4 2 2 2 4 4 5 5 0 0M MH H z z 1 1 . . 1 1 5 5 3 3 2 5 5 0 0 0 0M MH H z z 2 2 . . 5 5 7 7 PAGE 5 OF5 RadiationPattern TheGainpatternismeasuredinINPAQ’sFAR-fieldchamber.DUTisplacedonthetableof rotator,astandardhornantennaandVectorNetworkAnalyzerisusedtocollectdata. ◎ 3DGainPattern(2400MHz) ◎2DGainPattern(2400MHz) UNLESSOTHERSPECIFIEDTOLERANCESON： X＝±X.X＝±X.XX＝ HOLEDIA＝ANGLES＝ ±± SCALE：N/AUNIT：mm T DRAWNBY:SeraCHECKEDBY:XD DESIGNEDBY:SeraAPPROVEDBY:XD DOCUMENT NO TITLE：CHIP2450-21Specification . SPECREV 2012 . P1

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 35 TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: ring FCC ID: 2BUC4-RING0001 Trademark(s): N/A Model/Type reference: ring 0001 Applicant’s name: guangzhouxingguangbiaoyeyouxiangongsi Address: Room 102, Building 1, No. 19, Yongxing Shajing East Road, Longgui Street, Baiyun District, Guangzhou, China Manufacturer: E-FORTUNE Digital Manufactory Ltd. Address: Floor 4, Building 4 Jinmeiwei Industrial Park, Shajing Street Baoan District Shenzhen China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Dec. 23, 2025 Sample tested Date: Dec. 23, 2025 to Dec. 27, 2025 Issue Date: Dec. 27, 2025 Report No.: CTB25122302103RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25122302103RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 35 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................ 3 2. TEST SUMMARY ........................................................................................................................... 4 3. MEASUREMENT UNCERTAINTY ................................................................................................. 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................ 6 4.1 Product Information .......................................................................................................................... 6 4.2 Test Setup Configuration .................................................................................................................. 6 4.3 Support Equipment........................................................................................................................... 6 4.4 Channel List ..................................................................................................................................... 7 4.5 Test Mode ........................................................................................................................................ 7 4.6 Test Environment ............................................................................................................................. 7 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 8 5.1 Test Facility ...................................................................................................................................... 8 5.2 Test Instrument Used ....................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 11 6.1 Block Diagram Of Test Setup ......................................................................................................... 11 6.2 Limit ................................................................................................................................................ 11 6.3 Test procedure ............................................................................................................................... 11 6.4 Test Result ..................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................. 15 7.1 Block Diagram Of Test Setup ......................................................................................................... 15 7.2 Limit ................................................................................................................................................ 15 7.3 Test procedure ............................................................................................................................... 15 7.4 Test Result ..................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 24 8.1 Block Diagram Of Test Setup ......................................................................................................... 24 8.2 Limit ................................................................................................................................................ 24 8.3 Test procedure ............................................................................................................................... 24 8. 4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ..............................................................................................…

Text truncated - open the document above for the full version.

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: ring 0001 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions