2BT2M-SMURVE80PLAY KEYBOARD

Keybuilder Co., Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [January 5, 2026] U.S. Agent Designation [Keybuilder Co., Ltd.] 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: 2BT2M-SMURVE80 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 [Keybuilder Co., Ltd.]. [Keybuilder Co., Ltd.] with the FRN [0037824299] 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 [HUANG PEI YEN] [Huiying Fan] [person in charge] [Director] [Keybuilder Co., Ltd.] [GLOCERTS TECHNOLOGY INC]

Keybuilder Co., Ltd. (January 5, 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: 2BT2M-SMURVE80 [Keybuilder Co., Ltd.] (“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) HUANG PEI YEN Keybuilder Co., Ltd. (January 5, 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: 2BT2M-SMURVE80 [Keybuilder 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 as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) HUANG PEI YEN

Keybuilder Co., Ltd. (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (PLAY KEYBOARD / Smurve80 / FCC ID: 2BT2M-SMURVE80) 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: HUANG PEI YEN Title: person in charge

Keybuilder Co., Ltd. (January 5, 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: HUANG PEI YEN Title: person in charge

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: Smurve80 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

FCC ID LABEL: Label Location: FCC ID: 2BT2M-SMURVE80 Model No.: Smurve80

Shenzhen CTB Testing Co., Ltd. FCC ID:2BT2M-SMURVE80 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:1M 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 -1.341 0.73 -1±1 0.00 1.00 <5 0.30997 3.00 YES 2.44 -0.646 0.86 0±1 1.00 1.26 <5 0.39330 3.00 YES 2.480 0.213 1.05 0±1 1.00 1.26 <5 0.39651 3.00 YES GFSK BLE:2M 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 -1.222 0.75 -1±1 0.00 1.00 <5 0.30997 3.00 YES 2.44 -0.62 0.87 0±1 1.00 1.26 <5 0.39330 3.00 YES 2.480 0.439 1.11 0±1 1.00 1.26 <5 0.39651 3.00 YES GFSK 2.4GHz: 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 -0.958 0.80 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.44 -0.604 0.87 0±1 1.00 1.26 <5 0.39330 3.00 YES 2.480 0.476 1.12 0±1 1.00 1.26 <5 0.39651 3.00 YES GFSK Conclusion: For the max result : 0.39651≤ FCC Limit 3.0 for 1g SAR.

第1页共 6 页 天线规格书 RDMCTMZT-RF01 型号名称：RDMCTMZT-RF01 项目类型：键盘板载天线 日期： 2024-05-24 第 2 页 共 6 页 Antenna floor plan Antenna technical parameters and environmental testing: 电气技术参数 电 性 能 指 标 Electrical Specifications 频率范围 2400-2500MHz Frequency Range 2400-2500MHz 电压驻波比 ＜1.92 VSWR ＜1.92 输入阻抗 50 Ω Input Impedance 50 Ω 方向全向 Direction All 增益 2.0±1dBi Gain 2.0±1dBi 机 械 指 标 Mechanical Specifications 接口形式 OPEN Input connector OPEN 工作温度 -20°C~+70°C Working Temperature -20°C~+70°C 工作湿度 20%~80% Working Humidity 20%~80% Environmental performance testing 项目测试条件规格 储存环境 在没有指定的情况下测试温度、湿度、气压如下： 1. 温度为-20°C~+70°C 2.相对湿度为45%-85% 3.气压为86kpa-106kpa 电气机械性能正常 高低温试验 在70°C与-20°C之间进行5次循环，然后在正常条件下 1-2H，检查外观质量。 尺寸应满足规定并应满 足于机械、电气性能 耐恒定 湿热试验 相对湿度95±3%，试验温度：40°C.持续2H作用后， 试品取出后5min之内测定电气性能，试品在正常条 件下1-2H，检查外观质量 尺寸应满足规定并应满 足于机械、电气性能 振动试验 振频范围10-55HZ，位移幅值：0.35MM，加速度幅值： 50.0M/S，扫频循环次数：30次 电气机械性能正常 跌落试验 1M高空按照互相垂直的轴方向自由跌落3次电气机械性能正常 Antenna physical picture Antenna performance test diagram 2D.3D test data (2.4G) : FrequencyEfficiency(%) Gain.(dBi) 2400MHz 43.852.46 2410MHz 45.922.36 2420MHz 46.132.10 2430MHz 46.882.13 2440MHz 47.102.27 2450MHz 48.192.49 2460MHz 47.532.44 2470MHz 48.752.59 2480MHz 46.772.39 2490MHz 47.422.36 2500MHz 45.602.21 Phi 0 2D图:Phi 90 2D图Theta 90 2D图 3D 2400： 3D 2450： 3D 2500

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 41 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: PLAY KEYBOARD FCC ID: 2BT2M-SMURVE80 Trademark(s): N/A Model/Type reference: Smurve80 Applicant’s name: Keybuilder Co., Ltd. Address: 1 F., NO. 236-1, YINGCAI RD., NORTH DIST., TAICHUNG CITY 404023, TAIWAN Manufacturer: Shenzhen Mochron Technology Co.,Ltd Address: Room 402 4th Floor Building D Canyuan Technology Park No.36 Shilongzai Avenue Shuitian Community Shiyan Subdistrict Bao'an District Shenzhen 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: Nov. 25, 2025 Sample tested Date: Nov. 25, 2025 to Dec. 20, 2025 Issue Date: Dec. 20, 2025 Report No.: CTB25112502506RF01 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.: CTB25112502506RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 41 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 ............................................................................................................................... 16 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 .........................................................................................…

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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: PLAY KEYBOARD FCC ID: 2BT2M-SMURVE80 Trademark(s): N/A Model/Type reference: Smurve80 Applicant’s name: Keybuilder Co., Ltd. Address: 1 F., NO. 236-1, YINGCAI RD., NORTH DIST., TAICHUNG CITY 404023, TAIWAN Manufacturer: Shenzhen Mochron Technology Co.,Ltd Address: Room 402 4th Floor Building D Canyuan Technology Park No.36 Shilongzai Avenue Shuitian Community Shiyan Subdistrict Bao'an District Shenzhen 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: Nov. 25, 2025 Sample tested Date: Nov. 25, 2025 to Dec. 20, 2025 Issue Date: Dec. 20, 2025 Report No.: CTB25112502506RF02 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is 2.4GHz radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25112502506RF02 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 ............................................................................................................................... 16 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 T est procedure ............................................................................................................................... 24 8.4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ............................................................................................…

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