2BGKB-Q5ULTRAWireless Mechanical Keyboard

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter. Radiation Exposure Statement The device has been evaluated to meet general RF exposure requirement in portable exposure condition without restriction.

FCC ID: 2BGKB-Q5Ultra Page 1 of 2 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd RADIO FREQUENCY EXPOSURE Limit According to section B.4 of 447498 D04 Interim General RF Exposure Guidance v01 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). Where and f is in GHz, d is the separation distance (cm), and ERP 20cm is per Formula (B.1). FCC ID: 2BGKB-Q5Ultra Page 2 of 2 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Results RF Exposure at Separation distance (cm): 0.5 Mode Antenna Frequency [MHz] Conducted Power [dBm] Manufacturing tolerance Antenna Gain [dBi] Max of ERP and Conducted Power including Tune Up SAR- based exemption threshold Pth [mW] Target Power [dBm] Tolerance ±[dB] [dBm] [mW] SRD Ant1 2402 1.55 1 1 0 2 1.58 2.79 SRD Ant1 2440 2 1.5 1 0 2.5 1.78 2.75 SRD Ant1 2480 1.86 1.5 1 0 2.5 1.78 2.72 BLE_1M Ant1 2402 1.89 1.5 1 0 2.5 1.78 2.79 BLE_1M Ant1 2440 2.4 2 1 0 3 2.00 2.75 BLE_1M Ant1 2480 2.31 2 1 0 3 2.00 2.72 Note: SRD and BLE cannot transmit simultaneously. Max of ERP and Conducted Power including Tune Up (dBm) = Max Conducted Tune Up Power(dBm) and Max Conducted Tune Up Power(dBm) + Antenna Gain(dBi)-2.15), whichever is greater. The Maximum Erp is used for Routine Evaluation Exemption according to B.4 of 447498 D04 Interim General RF Exposure Guidance v01. So, the SAR evaluation is not required.

Report No.: TZ0015260405PH01 Page 1 of 2 Test Setup Photos of the EUT Conducted Emission Radiated Emission Below 1GHz Report No.: TZ0015260405PH01 Page 2 of 2 Radiated Emission Above 1GHz RF Conducted Test

Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 1 of 23 Appendix Test Data for BLE (Conducted Measurement) Product Name: Wireless Mechanical Keyboard Trade Mark: Keychron, Lemokey Test Model: Q5 Ultra FCC ID: 2BGKB-Q5ULTRA Environmental Conditions Temperature: 23.5°C Relative Humidity: 58% ATM Pressure: 100.0 kPa Test Engineer: Allen Lai Supervised by: Max Zhang NOTE N/A Appendix A: DTS Bandwidth Test Result Test Mode Antenna Frequency [MHz] DTS BW [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict BLE_1M Ant1 2402 0.668 2401.680 2402.348 0.5 PASS BLE_1M Ant1 2440 0.696 2439.648 2440.344 0.5 PASS BLE_1M Ant1 2480 0.664 2479.668 2480.332 0.5 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 2 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 3 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 4 of 23 Appendix B: Occupied Channel Bandwidth Test Result Test Mode Antenna Frequency [MHz] OCB [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict BLE_1M Ant1 2402 1.0311 2401.4827 2402.5138 --- --- BLE_1M Ant1 2440 1.0446 2439.4704 2440.5150 --- --- BLE_1M Ant1 2480 1.0368 2479.4753 2480.5121 --- --- Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 5 of 23 Test Graphs BLE_1M-Ant1-2402 BLE_1M-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 6 of 23 BLE_1M-Ant1-2480 Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 7 of 23 Appendix C: Maximum peak conducted output power Test Result Peak Test Mode Antenna Frequency [MHz] Conducted Peak Power [dBm] Conducted Limit [dBm] Verdict BLE_1M Ant1 2402 1.89 ≤30 PASS BLE_1M Ant1 2440 2.40 ≤30 PASS BLE_1M Ant1 2480 2.31 ≤30 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 8 of 23 Test Graphs Peak BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 9 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 10 of 23 Appendix D: Maximum peak power spectral density Test Result Test Mode Antenna Frequency [MHz] Result [dBm/3kHz] Limit [dBm/3kHz] Verdict BLE_1M Ant1 2402 -8.82 ≤8.00 PASS BLE_1M Ant1 2440 -6.55 ≤8.00 PASS BLE_1M Ant1 2480 -6.19 ≤8.00 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 11 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 12 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 13 of 23 Appendix E: Band edge measurements Test Result Test Mode Antenna Ch. Name Frequency [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict BLE_1M Ant1 Low 2402 0.84 -49.87 ≤-19.16 PASS BLE_1M Ant1 High 2480 1.00 -48.77 ≤-19 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 14 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 15 of 23 Appendix F: Conducted Spurious Emission Test Result Test Mode Antenna Frequency [MHz] Freq. Range [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict BLE_1M Ant1 2402 0~Reference 0.79 0.79 --- PASS BLE_1M Ant1 2402 30~1000 0.79 -53.04 ≤-19.21 PASS BLE_1M Ant1 2402 1000~26500 0.79 -27.61 ≤-19.21 PASS BLE_1M Ant1 2440 0~Reference 1.33 1.33 --- PASS BLE_1M Ant1 2440 30~1000 1.33 -52.49 ≤-18.67 PASS BLE_1M Ant1 2440 1000~26500 1.33 -27.14 ≤-18.67 PASS BLE_1M Ant1 2480 0~Reference 1.39 1.39 --- PASS BLE_1M Ant1 2480 30~1000 1.39 -53.16 ≤-18.61 PASS BLE_1M Ant1 2480 1000~26500 1.39 -26.93 ≤-18.61 PASS Note: offset(dB) in Reference test plots = cable loss(dB) + attenuator factor(dB); For spurious emissions plots from 30MHz to 26.5GHz, the cable loss and attenuator factors have been set in the 'Input Correction' of the Spectrum Analyzer during the test. Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 16 of 23 Test Graphs BLE_1M-Ant1-2402-0~Reference-PASS BLE_1M-Ant1-2402-30~1000-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 17 of 23 BLE_1M-Ant1-2402-1000~26500-PASS BLE_1M-Ant1-2440-0~Reference-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 18 of 23 BLE_1M-Ant1-2440-30~1000-PASS BLE_1M-Ant1-2440-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 19 of 23 BLE_1M-Ant1-2480-0~Reference-PASS BLE_1M-Ant1-2480-30~1000-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 20 of 23 BLE_1M-Ant1-2480-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 21 of 23 Appendix G: Duty Cycle Test Result Test Mode Antenna Frequency [MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor [dB] BLE_1M Ant1 2402 19.00 19.00 100.00 0.00 BLE_1M Ant1 2440 19.00 19.00 100.00 0.00 BLE_1M Ant1 2480 19.00 19.00 100.00 0.00 Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 22 of 23 Test Graphs NTNV-BLE_1M-Ant1-2402 NTNV-BLE_1M-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260405FRF02 Page 23 of 23 NTNV-BLE_1M-Ant1-2480

BT AntennaTest Report Project Name：Q1 MAX 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. Date ：2023-10-30 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. Q1 MAX 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 2450MHZZ 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. FreqEfficiency_dBEfficiency_Pcent_%Gain_dBi 2400-6.0824.66 -1.2 2410-6.223.99 -0.24 2420-6.2623.66 -0.37 2430-6.3323.28 -1.47 2440-6.3223.31 -0.59 2450-6.1824.08 -1.91 2460-625.13 -1.27 2470-5.8226.17 -0.55 2480-5.6627.15 -1.83 2490-5.6227.43 -0.96 2500-5.5328 0.0 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved. 深圳汉阳天线设计有限公司 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. 地址：深圳市宝安区前进路宝运达物流信息大厦12A层. 电话：0755-23069700 SHENZHEN HANYANG ANTENNA DESIGN CO.LTD. Welcome calls consultations, negotiations and guidance come! Thank you 汉阳天线版权所有Copyright ©2014-2024 Shenzhen HanyangAntenna Design Co., Ltd. All rights reserved.

Report No.: TZ0015260405FRF12 Page 1 of 33 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Tongzhou Testing Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Tongzhou Testing Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. The test report apply only to the specific sample(s) tested under stated test conditions. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. TEST REPORT Report Number : TZ0015260405FRF12 Product Name : Wireless Mechanical Keyboard Model/Type reference : Q5 Ultra FCC ID : 2BGKB-Q5ULTRA Prepared for : Keychron Technology (Shenzhen) Co., Ltd. 201, Building 2, Wenkeng Industrial Zone, No. 24, Dafa Road, DafaPu Community, Bantian Jie Dao, Longgang District, Shenzhen, China Prepared By : Shenzhen Tongzhou Testing Co.,Ltd. 1st Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China Standards : FCC CFR Title 47 Part 15C, ANSI C63.10-2020+Cor. 1-2023 Date of Test : 2026-04-23 ~ 2026-05-06 Date of Issue : 2026-05-09 Prepared by : Nancy Li Reviewed by : Allen Lai Approved by : Max Zhang (Authorized Officer) Report No.: TZ0015260405FRF12 Page 2 of 33 ** Report Revise Record ** Report Version Revise Time Issued Date Valid Version Notes V1.0 / 2026-05-09 Valid Initial release Report No.: TZ0015260405FRF12 Page 3 of 33 TABLE OF CONTENTS 1. G E N E R A L I N F O R M A T I O N ........................................................ 4 1.1. Client Information ................................................................................................................... 4 1.2. Description of Device (EUT) ................................................................................................... 4 1.3. Wireless Function Tested in this Report .............................................................................. 4 1.4. EUT configuration ................................................................................................................... 5 1.5. Description of Test Facility .................................................................................................... 5 1.6. Statement of the Measurement Uncertainty ......................................................................... 6 1.7. Measurement Uncertainty ...................................................................................................... 6 1.8. Description of Test Modes ..................................................................................................... 6 1.9. Frequency of Channels .......................................................................................................... 7 2. T E S T M E T H O D O L O G Y ............................................................ 8 2.1. EUT Configuration .................................................................................................................. 8 2.2. EUT Exercise ........................................................................................................................... 8 2.3. Test Sample ............................................................................................................................. 8 3. S Y S T E M T E S T C O N F I G U R A T I O N .............................................. 9 3.1. Justification ............................................................................................................................. 9 3.2. EUT Exercise Software ........................................................................................................... 9 3.3. Special Accessories ............................................................................................................... 9 3.4. Block Diagram/Schematics .................................................................................................... 9 3.5. Equipment Modifications ....................................................................................................... 9 3.6. Test Setup ................................................................................................................................ 9 4. S U M M A R Y O F T E S T R E S U L T S ................................................ 10 5. T E S T R E S U L T ..................................................................... 11 5.1. On Time and Duty Cycle ....................................................................................................... 11 5.2. Maximum Peak Conducted Output Power Measurement ................................................. 12 5.3. Power Spectral Density Measurement ................................................................................ 13 5.4. 6 dB Spectrum Bandwidth and Occupied Channel Bandwidth Measurement ............... 14 5.5. Radiated Emissions Measurement ...................................................................................... 15 5.6. Conducted Spurious Emissions and Band Edges Test .................................................... 24 5.8. Band-edge measurements for radiated emissions ........................................................... 28 5.9. Antenna Requirements ......................................................................................................... 31 6. L I S T O F M E A S U R I N G E Q U I P M E N T .......................................... 32 7. T E S T S E T U P P H O T O G R A P H S O F E U T ...................................... 33 8. E X T E R I O R P H O T O G R A P H S O F E U T ......................................... 33 9. I N T E R I O R P H O T O G R A P H S O F E U T .......................................... 33 Report No.: TZ0015260405FRF12 Page 4 of 33 1. G E N E R A L I N F O R M A T I O N 1.1. Client Information Applicant : Keychr…

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Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 1 of 23 Appendix Test Data for SRD (Conducted Measurement) Product Name: Wireless Mechanical Keyboard Trade Mark: Keychron, Lemokey Test Model: Q5 Ultra FCC ID: 2BGKB-Q5ULTRA Environmental Conditions Temperature: 23.5°C Relative Humidity: 58% ATM Pressure: 100.0 kPa Test Engineer: Allen Lai Supervised by: Max Zhang NOTE N/A Appendix A: DTS Bandwidth Test Result Test Mode Antenna Frequency [MHz] DTS BW [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict SRD Ant1 2402 1.352 2401.332 2402.684 0.5 PASS SRD Ant1 2440 1.376 2439.296 2440.672 0.5 PASS SRD Ant1 2480 1.352 2479.336 2480.688 0.5 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 2 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 3 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 4 of 23 Appendix B: Occupied Channel Bandwidth Test Result Test Mode Antenna Frequency [MHz] OCB [MHz] FL [MHz] FH [MHz] Limit [MHz] Verdict SRD Ant1 2402 2.0296 2400.9818 2403.0114 --- --- SRD Ant1 2440 2.0427 2438.9744 2441.0171 --- --- SRD Ant1 2480 2.0464 2478.9732 2481.0196 --- --- Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 5 of 23 Test Graphs SRD-Ant1-2402 SRD-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 6 of 23 SRD-Ant1-2480 Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 7 of 23 Appendix C: Maximum peak conducted output power Test Result Peak Test Mode Antenna Frequency [MHz] Conducted Peak Power [dBm] Conducted Limit [dBm] Verdict SRD Ant1 2402 1.55 ≤30 PASS SRD Ant1 2440 2.00 ≤30 PASS SRD Ant1 2480 1.86 ≤30 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 8 of 23 Test Graphs Peak SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 9 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 10 of 23 Appendix D: Maximum peak power spectral density Test Result Test Mode Antenna Frequency [MHz] Result [dBm/3kHz] Limit [dBm/3kHz] Verdict SRD Ant1 2402 -10.44 ≤8.00 PASS SRD Ant1 2440 -11.43 ≤8.00 PASS SRD Ant1 2480 -11.02 ≤8.00 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 11 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 12 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 13 of 23 Appendix E: Band edge measurements Test Result Test Mode Antenna Ch. Name Frequency [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict SRD Ant1 Low 2402 -0.58 -35.4 ≤-20.58 PASS SRD Ant1 High 2480 -0.64 -48.3 ≤-20.64 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 14 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 15 of 23 Appendix F: Conducted Spurious Emission Test Result Test Mode Antenna Frequency [MHz] Freq. Range [MHz] Ref. Level [dBm] Result [dBm] Limit [dBm] Verdict SRD Ant1 2402 0~Reference -0.47 -0.47 --- PASS SRD Ant1 2402 30~1000 -0.47 -52.05 ≤-20.47 PASS SRD Ant1 2402 1000~26500 -0.47 -27.74 ≤-20.47 PASS SRD Ant1 2440 0~Reference 0.11 0.11 --- PASS SRD Ant1 2440 30~1000 0.11 -52.55 ≤-19.89 PASS SRD Ant1 2440 1000~26500 0.11 -27.42 ≤-19.89 PASS SRD Ant1 2480 0~Reference 0.21 0.21 --- PASS SRD Ant1 2480 30~1000 0.21 -52.72 ≤-19.79 PASS SRD Ant1 2480 1000~26500 0.21 -26.27 ≤-19.79 PASS Note: offset(dB) in Reference test plots = cable loss(dB) + attenuator factor(dB); For spurious emissions plots from 30MHz to 26.5GHz, the cable loss and attenuator factors have been set in the 'Input Correction' of the Spectrum Analyzer during the test. Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 16 of 23 Test Graphs SRD-Ant1-2402-0~Reference-PASS SRD-Ant1-2402-30~1000-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 17 of 23 SRD-Ant1-2402-1000~26500-PASS SRD-Ant1-2440-0~Reference-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 18 of 23 SRD-Ant1-2440-30~1000-PASS SRD-Ant1-2440-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 19 of 23 SRD-Ant1-2480-0~Reference-PASS SRD-Ant1-2480-30~1000-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 20 of 23 SRD-Ant1-2480-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 21 of 23 Appendix G: Duty Cycle Test Result Test Mode Antenna Frequency [MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor [dB] SRD Ant1 2402 19.00 19.00 100.00 0.00 SRD Ant1 2440 19.00 19.00 100.00 0.00 SRD Ant1 2480 19.00 19.00 100.00 0.00 Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 22 of 23 Test Graphs NTNV-SRD-Ant1-2402 NTNV-SRD-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260405FRF12 Page 23 of 23 NTNV-SRD-Ant1-2480

Report No.: TZ0015260405FRF02 Page 1 of 33 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Tongzhou Testing Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Tongzhou Testing Co.,Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. The test report apply only to the specific sample(s) tested under stated test conditions. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. TEST REPORT Report Number : TZ0015260405FRF02 Product Name : Wireless Mechanical Keyboard Model/Type reference : Q5 Ultra FCC ID : 2BGKB-Q5ULTRA Prepared for : Keychron Technology (Shenzhen) Co., Ltd. 201, Building 2, Wenkeng Industrial Zone, No. 24, Dafa Road, DafaPu Community, Bantian Jie Dao, Longgang District, Shenzhen, China Prepared By : Shenzhen Tongzhou Testing Co.,Ltd. 1st Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China Standards : FCC CFR Title 47 Part 15C, ANSI C63.10-2020+Cor. 1-2023 Date of Test : 2026-04-23 ~ 2026-05-06 Date of Issue : 2026-05-09 Prepared by : Nancy Li Reviewed by : Allen Lai Approved by : Max Zhang (Authorized Officer) Report No.: TZ0015260405FRF02 Page 2 of 33 ** Report Revise Record ** Report Version Revise Time Issued Date Valid Version Notes V1.0 / 2026-05-09 Valid Initial release Report No.: TZ0015260405FRF02 Page 3 of 33 TABLE OF CONTENTS 1. G E N E R A L I N F O R M A T I O N ....................................................... 4 1.1. Client Information ................................................................................................................... 4 1.2. Description of Device (EUT) ................................................................................................... 4 1.3. Wireless Function Tested in this Report .............................................................................. 4 1.4. EUT configuration ................................................................................................................... 5 1.5. Description of Test Facility .................................................................................................... 5 1.6. Statement of the Measurement Uncertainty ......................................................................... 6 1.7. Measurement Uncertainty ...................................................................................................... 6 1.8. Description of Test Modes ..................................................................................................... 6 1.9. Frequency of Channels .......................................................................................................... 7 2. T E S T M E T H O D O L O G Y ............................................................ 8 2.1. EUT Configuration .................................................................................................................. 8 2.2. EUT Exercise ........................................................................................................................... 8 2.3. Test Sample ............................................................................................................................. 8 3. S Y S T E M T E S T C O N F I G U R A T I O N .............................................. 9 3.1. Justification ............................................................................................................................. 9 3.2. EUT Exercise Software ........................................................................................................... 9 3.3. Special Accessories ............................................................................................................... 9 3.4. Block Diagram/Schematics .................................................................................................... 9 3.5. Equipment Modifications ....................................................................................................... 9 3.6. Test Setup ................................................................................................................................ 9 4. S U M M A R Y O F T E S T R E S U L T S ............................................... 10 5. T E S T R E S U L T .................................................................... 11 5.1. On Time and Duty Cycle ....................................................................................................... 11 5.2. Maximum Peak Conducted Output Power Measurement ................................................. 12 5.3. Power Spectral Density Measurement ................................................................................ 13 5.4. 6 dB Spectrum Bandwidth and Occupied Channel Bandwidth Measurement ............... 14 5.5. Radiated Emissions Measurement ...................................................................................... 15 5.6. Conducted Spurious Emissions and Band Edges Test .................................................... 24 5.8. Band-edge measurements for radiated emissions ........................................................... 28 5.9. Antenna Requirements ......................................................................................................... 31 6. L I S T O F M E A S U R I N G E Q U I P M E N T ......................................... 32 7. T E S T S E T U P P H O T O G R A P H S O F E U T ..................................... 33 8. E X T E R I O R P H O T O G R A P H S O F E U T ........................................ 33 9. I N T E R I O R P H O T O G R A P H S O F E U T ........................................ 33 Report No.: TZ0015260405FRF02 Page 4 of 33 1. G E N E R A L I N F O R M A T I O N 1.1. Client Information Applicant : Keychron Techn…

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Keychron Technology (Shenzhen) Co., Ltd. Covered Equipment Certification Attestation Letter 5/28/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BGKB-Q5ULTRA Keychron Technology (Shenzhen) 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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities i…

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