2AURQ-CD108HBMechanical Keyboard

Attestation Statements (January 3, 2024) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: 2AURQ-CD108HB) (MISTEL CO LTD), the undersigned, hereby authorize (NEWENERGYER LIMITED) to act as our designated U.S. agent for service of process, (MISTEL CO LTD) 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. (NEWENERGYER LIMITED) accepts the responsibility to act as designated U.S. agent for service of process, provides 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. Applicant Information： Company name: MISTEL CO LTD Contact Name: CHANG JAMES Address: Rm.4,10F.,No.17,Ln.91,Sec.1,NeihuRd.,NeihuDist.,TaipeiCity114,Taiwan Telephone No: 13538214502 Email: [email protected] FRN: 0028878536 Signature [CHANG JAMES] U.S. Agent Information: Company Name: NEWENERGYER LIMITED Address: 1818 S Patton Ct, Denver, CO, 80219 Contact Name: CHUN LIU Telephone No: 213 289 5042 Email: [email protected] FRN: 0034665885 Signature [CHUN LIU]

(MISTEL CO LTD) (January 3, 2024) 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: 2AURQ-CD108HB) [MISTEL 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. Sincerely, (Applicant signature) (Applicant printed name) CHANG JAMES (MISTEL CO LTD) (January 3, 2024) 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: 2AURQ-CD108HB) [MISTEL 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) CHANG JAMES

MISTEL CO LTD (January 3, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Mechanical Keyboard / CD108 HB / FCC ID: 2AURQ-CD108HB) 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: CHANG JAMES Title: Manager

MISTEL CO LTD (January 3, 2024) 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: CHANG JAMES Title: Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: CD108 HB 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:

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: CD108 HB Internal 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 ANT Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

Shenzhen CTB Testing Co., Ltd. FCC ID:2AURQ-CD108HB 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 0.494 1.12 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.44 -0.623 0.87 0±1 1.00 1.26 <5 0.39330 3.00 YES 2.480 -0.784 0.83 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.

深 圳 祥博一科技有 限 公 司 Shenzhen Xiangboyi Technology Co,.Ltd  天线测试报告 Antenna Test Report 客户案号 / Customer No. : 蓝色 PCB 键盘 日期 /Date ： 2021 年 12 月 6 日 项目负责人 : 郭子俊 Antenna size Antenna efficiency ： Passive Test For 2.4G Freq Effi Effi Gain Gain UHIS DHIS Max Min Attenut Attenut (MHz) (%) (dB) (dBi) (dBd) (%) (%) (dB) (dB) Hor Ver 2400 35.63 -4.48 0.58 -1.57 18.111 17.516 0.58 -13.44 52.04 52.1 2410 35.09 -4.55 0.54 -1.61 17.833 17.261 0.54 -14.32 52.46 52.46 2420 38.23 -4.18 0.92 -1.23 19.429 18.796 0.92 -14.63 52.08 52.29 2430 30.16 -5.21 -0.02 -2.17 15.37 14.787 -0.02 -15.68 50.32 50.232440 42.58 -3.71 1.58 -0.57 21.64 20.94 1.58 -14.02 51.45 51.43 2450 30.98 -5.09 0.36 -1.79 15.605 15.379 0.36 -15.78 50.23 50.3 2460 35.38 -4.51 1.12 -1.03 17.671 17.712 1.12 -15.33 51.42 51.44 2470 24.98 -6.02 -0.21 -2.36 12.275 12.703 -0.21 -17.97 51.08 512480 31.92 -4.96 0.9 -1.25 15.54 16.384 0.9 -17.82 51.42 51.44 2490 22.83 -6.41 -0.43 -2.58 10.925 11.91 -0.43 -21.06 51.06 50.782500 32.31 -4.91 1.06 -1.09 15.301 17.008 1.06 -20.48 51.52 51.43 ANT 2.4-2.5GHz Antenna pattern ANT 2.4-2.5GHz Antenna pattern Thanks for your valuable comment!

TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu 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. Product Name: Mechanical Keyboard FCC ID: 2AURQ-CD108HB Trademark: Model Number: CD108 HB Prepared For: MISTEL CO LTD Address: Rm.4,10F.,No.17,Ln.91,Sec.1,NeihuRd.,NeihuDist.,TaipeiCity114,Taiwan Manufacturer: Zhuhai Hoksi Technology CO.,LTD Address: Room803, NO.3 building, No.6, P ingbei 1 Road, Nanping, T echnology & Industry Park, Xiangzhou District, Zhuhai City, China, 519060 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. 20, 2023 Sample tested Date: Dec. 20, 2023 to Dec. 27, 2023 Issue Date: Dec. 27, 2023 Report No.: CTB231227071RFX Test Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB231227071RFX 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 ................................................................................ 10 6.1 Block Diagram Of Test Setup ......................................................................................................... 10 6.2 Limit ................................................................................................................................................ 10 6.3 Test procedure ............................................................................................................................... 10 6.4 Test Result ..................................................................................................................................... 12 7. RADIATED SPURIOUS EMISSION ............................................................................................. 14 7.1 Block Diagram Of Test Setup ......................................................................................................... 14 7.2 Limit ................................................................................................................................................ 14 7.3 Test procedure ............................................................................................................................... 15 7.4 Test Result ..................................................................................................................................... 16 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............................................... 23 8.1 Block Diagram Of Test Setup ......................................................................................................... 23 8.2 Limit ................................................................................................................................................ 23 8.3 Test procedure ............................................................................................................................... 23 8.4 Test Result ..................................................................................................................................... 24 9. COUDUCTED OUTPUT POWER ................................................................................................. 26 9.1 Block Diagram Of Test Setup ......................................................................................................... 26 9.2…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: CD108 HB 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