2BFDF-ZERO98Triple-Mode Mechanical Key board

Qingdao Thunderobot Technology Co., Ltd. 2026.8.25 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 2BFDF-ZERO98 [Qingdao Thunderobot Technology 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) ： Chao Yuan Qingdao Thunderobot Technology Co., Ltd. 2026.8.25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for2BFDF-ZERO98 [Qingdao Thunderobot 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 as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) ： Chao Yuan

Qingdao Thunderobot Technology Co., Ltd. 2026.8.25 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 ETR Standard Technology Co., Ltd. Smith Chen 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, Applicant’s Name: Chao Yuan Title: Manager Signature:

Qingdao Thunderobot Technology Co., Ltd. 2026.8.25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For(Triple-Mode Mechanical Keyboard / ZERO98 /FCC ID: 2BFDF-ZERO98) To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, < Qingdao Thunderobot Technology Co., Ltd. >. requests short-term Confidentiality of following sections of this application for a period of 180 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < Qingdao Thunderobot Technology Co., Ltd.> considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, < Qingdao Thunderobot Technology Co., Ltd. > feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Applicant’s Name: Chao Yuan Title: Manager Signature:

Qingdao Thunderobot Technology Co., Ltd. 2026.8.25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Triple-Mode Mechanical Keyboard / ZERO98 /FCC ID: 2BFDF-ZERO98 ) 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 (SCH，Block Diagram，Operational Description) required to be submitted with this application be permanently withheld from public review. the above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Applicant’s Name: Chao Yuan Title: Manager Signature:

Label and Label location Product Dimensions: 394 × 145 × 43 mm

FCC ID: 2BFDF-ZERO98 RF Exposure Evaluation TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). FCC ID: 2BFDF-ZERO98 For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). This exemption may not be used in conjunction with other exemption criteria other than those is paragraph (b)(3)(i)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(i)(A). (B) in the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation. Where: a = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(B) of Part 1.1307 for Pth, including existing exempt transmitters and those being added. b = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(C) of Part 1.1307 for Threshold ERP, including existing exempt transmitters and those being added. c = number of existing fixed, mobile, or portable RF sources with known evaluation for the specified minimum distance including existing evaluated transmitters. Pi = the available maximum time-averaged power or the ERP, whichever is greater, for fixed, mobile, or portable RF source i at a distance between 0.5 cm and 40 cm (inclusive). Pth,i = the exemption threshold power (Pth) according to paragraph (b)(3)(i)(B) of this section for fixed, mobile, or portable RF source i. FCC ID: 2BFDF-ZERO98 ERPj = the ERP of fixed, mobile, or portable RF source j. ERPth,j = exemption threshold ERP for fixed, mobile, or portable RF source j, at a distance of at least λ/2π according to the applicable formula of paragraph (b)(3)(i)(C) of Part 1.1307. Evaluatedk = the maximum reported SAR or MPE of fixed, mobile, or portable RF source k either in the device or at the transmitter site from an existing evaluation at the location of exposure. Exposure Limitk = either the general population/uncontrolled maximum permissible exposure (MPE) or specific absorption rate (SAR) limit for each fixed, mobile, or portable RF source k, as applicable from § 1.1310. Test Result of RF Exposure Evaluation Protocol Fre. (GHz) Output power (dBm) Tune-up power (dBm) Max tune-up power (dBm) ANT Gain ( dBi) Max EIRP (dBm) Max ERP (dBm) Max ERP (mW) Sep. distance (cm) Limit (mW) Result BLE GFSK 4.79 5±1 6 -4.51 1.49 -0.66 0.86 0.5 2.76 PASS Protocol Fre. (GHz) Output power (dBm) Tune-up power (dBm) Max tune-up power (dBm) ANT Gain ( dBi) Max EIRP (dBm) Max ERP (dBm) Max ERP (mW) Sep. distance (cm) Limit (mW) Result BT 2.402 -1.82 -1±1 0 -4.51 -4.51 -6.66 0.22 0.5 2.76 PASS Protocol Fre. (GHz) E-field (dBuV/m) EIRP (dBm) ERP (dBm) ERP (mW) Separation distance (cm) Limit (mW) Result 2.4G 2.402 92.15 -3.05 -5.20 0.30 0.5 2.76 PASS Note: EIRP(dBm)=E (dBuV/m)-95.2 ERP=EIRP-2.15dB This device is portable device. 1. The source of the evaluation data results is based on the test report ET-26073626E01/02/03 2. The Maxinum power is less than the limit, complies with the exemption requirements.

8959-2项目调试报告 Antenna Test Report V1.0 @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd F：吕杰（Jie Lv） 电话（Mobile phone）：13530413724 日期（Date）：2026.05.12 地址（Iocation）：深圳市宝安区石岩街道宝源社区奋达科技园二期2号楼 添加标题文字 单击此处输入描述文字内容，请尽量内容言简意赅，单击此处输入描述文字 内容请尽量内容言简意赅。 Version:Date: Summary of content： V1.02026.05.12天线测试报告 历史版本（Revision History） @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 添加标题文字 目录（Catalogue） @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 01 02 03 04 05 06 项目概况（Project Overview） 测试环境（Test Environment） 天线图片和位置（Antenna picture and position） 天线环境处理（Antenna environment processing） 无源测试（Passive test ） 有源测试（Active test） 07 建议和总结：（Recommendations and Summary：） 添加标题文字 单击此处输入描述文字内容，请尽量内容言简意赅，单击此处输入描述文字 内容请尽量内容言简意赅。 项目概况（Project Overview） @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 客户名称 Customer Name 项目名 Project Name 天线数目 Antenna Number 天线类型 Antenna Type 川东 8959-21 板载 天线 天线频段 Frequency Bands WIFI / BT✔ 2400-2500MHz GNSS / NB / 2G / 3G/ 4G/ 5G / 添加标题文字 单击此处输入描述文字内容，请尽量内容言简意赅，单击此处输入描述文字 内容请尽量内容言简意赅。 测试环境（Test Environment）： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd Test Equipment Agilent E5071B 300 kHz - 8.5 GHz Test SystemSY-24M SISO/MIMO, 400 - 8500MHz 测试环境（Test Environment）-鼠标： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd +Z +Y +X @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 天线图片和位置（Antenna picture and position）-原始状态： ANT 无源测试：驻波比（Passive test: VSWR）-原始状态： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 无源测试：效率和增益（Passive test: Efficiency&Gain）-原始状态： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd frequency 频率 (MHz) gain 增益 (dBi) efficiency 效率 (dB) efficiency 效率 (%) 2400.00-4.51-10.249.46 2410.00-4.91-10.728.48 2420.00-5.34-11.147.70 2430.00-5.59-10.997.97 2440.00-5.87-11.017.93 2450.00-6.26-11.437.20 2460.00-6.21-11.377.30 2470.00-5.87-11.317.39 2480.00-6.07-11.696.78 2490.00-6.47-12.016.30 2500.00-6.39-11.926.43 方向图（Directional diagram）-原始状态： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 2400MHz 2450MHz 2500MHz 匹配电路（Matching circuit）-原始状态： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd E1E2E3 NANANA 匹配参数未使用原始状态参数。 匹配电路（Matching circuit）-接收器 @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd E1E2E3 NA0.5PFNA 匹配参数: IC--串0.5PF-ANT 建议和总结：（Recommendations and Summary：）： @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 如上为8959-2项目天线调试报告，原始状态下有一定的频偏，去除 原始π型匹配参数，并位未使用，串位串联0.5PF电容后效率在35%以 上，如上请客户评估，谢谢！ @深圳市大泽无线技术有限公司 Shenzhen Daze Wireless Technology Co., Ltd 谢谢 THANKS

Report No.: ET-26073626E03 This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen ETR Standard Technology Co., Ltd TEST REPORT Applicant: Qingdao Thunderobot Technology Co., Ltd. Address of Applicant: No. 1 Haier Rd., Laoshan District,Qingdao, Shandong, China Manufacturer: Qingdao Thunderobot Technology Co., Ltd. Address of Manufacturer: No. 1 Haier Rd., Laoshan District,Qingdao, Shandong, China Factory: Dongguan ChuanD Electronics Technology Co., Ltd. Address of Factory: Xihe Industrial Zone, Sijia, Shijie Town, Dongguan City,Guangdong Province, P.R.China Product Name: Triple-Mode Mechanical Keyboard Model No.: ZERO98 Trade Mark: N/A FCC ID: 2BFDF-ZERO98 Applicable standards: CFR Title 47 Part 15.249 Date of Test: Jul.23, 2026- Aug.18, 2026 Date of report issued: Aug.22, 2026 Remark: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver Prepared By Shenzhen ETR Standard Technology Co., Ltd. Address: No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Compiled by: Reviewed by: Approved by: Project Engineer Project Manager Authorized Signature - Page 2 of 26 - Report No.: ET-26073626E03 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Report Revision History Report No. Description Issue Date ET-26073626E03 Original Aug.22, 2026 - Page 3 of 26 - Report No.: ET-26073626E03 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Contents Page 1 TEST SUMMARY ......................................................................................................................................4 2 GENERAL INFORMATION .......................................................................................................................5 2.1 GENERAL DESCRIPTION OF EUT ..........................................................................................................5 2.2 TEST MODE .........................................................................................................................................7 2.3 DESCRIPTION OF SUPPORT UNITS ........................................................................................................7 2.4 DEVIATION FROM STANDARDS ..............................................................................................................7 2.5 ABNORMALITIES FROM STANDARD CONDITIONS ....................................................................................7 2.6 TEST FACILITY.....................................................................................................................................7 2.7 TEST LOCATION...................................................................................................................................7 2.8 ADDITIONAL INSTRUCTIONS ..................................................................................................................7 3 TEST INSTRUMENTS LIST ......................................................................................................................8 4 TEST RESULTS AND MEASUREMENT DATA .......................................................................................9 4.1 ANTENNA REQUIREMENT ......................................................................................................................9 4.2 CONDUCTED EMISSIONS ....................................................................................................................10 4.3 RADIATED EMISSION MEASUREMENT ..................................................................................................13 4.3.1 Field Strength of The Fundamental Signal ..................................................................................15 4.3.2 Spurious emissions .....................................................................................................................16 4.3.3 Bandedge emissions ...................................................................................................................21 4.4 20DB BANDWIDTH AND 99% BANDWIDTH............................................................................................23 5 TEST SETUP PHOTO .............................................................................................................................26 6 EUT CONSTRUCTIONAL DETAILS .......................................................................................................26 - Page 4 of 26 - Report No.: ET-26073626E03 Tel:(86-0755) 85259392 Email:[email protected] Web: www.etrlab.cn No.103, No.10, Phase I, Zone 3, Xinxing Industrial Park, Xinhe, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China 1 Test Summary Test Item Section in CFR 47 Result Test by Antenna requirement 15.203 Pass / AC Power Line Conducted Emission 15.207 Pass Jason Huang Field strength of the fundamental signal 15.249 (a) Pass Jason Huang Spurious emissions 15.249 (a) (d)/15.209 Pass Leo Zhong Band edge 15.249 (d)/15.205 Pass Jason Huang 20dB Occupied Bandwidth 99% Occupied Bandwidth 15.215 (c) Pass Oliver Wang Remarks: 1. Pass: The EUT complies with the essential requirements in the standard. 2. Test according to ANSI C63.10-2020 + Cor. 1-2023+C63.10a-2024 + Errata to C63.10a-2024 3. Note: Compliance determination rules 1).The Compliance determination of test results does not take into account measurement uncertainty. Measurement results are determined based on regulatory limitations or req…

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