2BGKB-V3ULTRAWireless 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.

Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 1 of 23 Appendix Test Data for BLE (Conducted Measurement) Product Name: Wireless Mechanical Keyboard Trade Mark: Keychron, Lemokey Test Model: V3 Ultra FCC ID: 2BGKB-V3ULTRA 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 0.672 2401.672 2402.344 0.5 PASS BLE_1M Ant1 2440 0.696 2439.648 2440.344 0.5 PASS BLE_1M Ant1 2480 0.696 2479.652 2480.348 0.5 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 2 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 3 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 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 1.0307 2401.4804 2402.5111 --- --- BLE_1M Ant1 2440 1.0266 2439.4781 2440.5047 --- --- BLE_1M Ant1 2480 1.0378 2479.4811 2480.5189 --- --- Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 5 of 23 Test Graphs BLE_1M-Ant1-2402 BLE_1M-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 6 of 23 BLE_1M-Ant1-2480 Appendix Test Data of the Report No.: TZ0015260408FRF02 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 1.21 ≤30 PASS BLE_1M Ant1 2440 1.71 ≤30 PASS BLE_1M Ant1 2480 1.51 ≤30 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 8 of 23 Test Graphs Peak BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 9 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 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 -9.41 ≤8.00 PASS BLE_1M Ant1 2440 -8.14 ≤8.00 PASS BLE_1M Ant1 2480 -8.08 ≤8.00 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 11 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 12 of 23 BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 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 0.52 -49.24 ≤-19.48 PASS BLE_1M Ant1 High 2480 1.01 -48.71 ≤-18.99 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 14 of 23 Test Graphs BLE_1M-Ant1-2402-PASS BLE_1M-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 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 0.50 0.50 --- PASS BLE_1M Ant1 2402 30~1000 0.50 -62.69 ≤-19.5 PASS BLE_1M Ant1 2402 1000~26500 0.50 -36.89 ≤-19.5 PASS BLE_1M Ant1 2440 0~Reference 1.32 1.32 --- PASS BLE_1M Ant1 2440 30~1000 1.32 -62.93 ≤-18.68 PASS BLE_1M Ant1 2440 1000~26500 1.32 -37.82 ≤-18.68 PASS BLE_1M Ant1 2480 0~Reference 0.77 0.77 --- PASS BLE_1M Ant1 2480 30~1000 0.77 -62.53 ≤-19.23 PASS BLE_1M Ant1 2480 1000~26500 0.77 -36.77 ≤-19.23 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.: TZ0015260408FRF02 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.: TZ0015260408FRF02 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.: TZ0015260408FRF02 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.: TZ0015260408FRF02 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.: TZ0015260408FRF02 Page 20 of 23 BLE_1M-Ant1-2480-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260408FRF02 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.: TZ0015260408FRF02 Page 22 of 23 Test Graphs NTNV-BLE_1M-Ant1-2402 NTNV-BLE_1M-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260408FRF02 Page 23 of 23 NTNV-BLE_1M-Ant1-2480

Report No.: TZ0015260408PH01 Page 1 of 2 Test Setup Photos of the EUT Conducted Emission Radiated Emission Below 1GHz Report No.: TZ0015260408PH01 Page 2 of 2 Radiated Emission Above 1GHz RF Conducted Test

TestReport ForAntenna1 Tested Products. • Antenna1: integrated antenna. • Frequency = 2.402GHz. • Frequency = 2.441GHz. • Frequency = 2.480GHz. Antenna1 Photo&Length(mm) Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XZ Plane at f = 2.402GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15-10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. YZ Plane at f = 2.402GHz 180 135 90 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 90 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XY Plane at f = 2.402GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XZ Plane at f = 2.441GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. YZ Plane at f = 2.441GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XY Plane at f = 2.441GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XZ Plane at f = 2.480GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. YZ Plane at f = 2.480GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 Co-crosspolarizationfield(dBi) Solid line: vertical polarization Dash line: horizontal polarization Totalfield(dBi) Radiation pattern: Antenna 1. XY Plane at f = 2.480GHz 90 90 180 135 0 -5 45 -10 -15 -20 -25 -30 -35-30 -25 -20 -15 -10 -50 0 180 135 0 45 -5 -10 -15 -10-50 0 225315 225315 270 270 R e t ur n L o s s ( d B ) ReturnLoss:Antenna1 -2 -4 -6 -8 -10 -12 -14 -16 22.22.42.62.83 Frequency(GHz) BW(-10dB) 13.48% MAX Gain 0d Bi Measurementssummary Frequency(GHz)PlaneReturnLoss(dB)PolarizationGainmax.(dBi)θ forGainmax.φforGainmax. Antenna 1 2.402XZ-10.90Vertical-7.8290 2.402XZ-10.90Horizontal -0.786 182 2.402YZ-10.90Vertical -1.21 226 2.402YZ-10.90Horizontal-7.7510 2.402XY-10.90Vertical-15.420 2.402XY-10.90Horizontal -0.93 180 2.441XZ-12.20Vertical-7.36318 2.441XZ-12.20Horizontal-1.32180 2.441YZ-12.20Vertical -0.981 204 2.441YZ-12.20Horizontal-8.2324 2.441XY-12.20Vertical-14.1-14 2.441XY-12.20Horizontal -1.74 180 2.48XZ-13.80Vertical-7.95312 2.48XZ-13.80Horizontal -1.81 186 2.48YZ-13.80Vertical-0.0214 2.48YZ-13.80Horizontal-8.388 2.48XY-13.80Vertical-15.812 2.48XY-13.80Horizontal-1.87180

Report No.: TZ0015260408FRF12 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 : TZ0015260408FRF12 Product Name : Wireless Mechanical Keyboard Model/Type reference : V3 Ultra FCC ID : 2BGKB-V3ULTRA 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 : 2026-04-29 ~ 2026-05-27 Date of Issue : 2026-05-28 Prepared by : Lena Wen Reviewed by : Allen Lai Approved by : Max Zhang (Authorized Officer) Report No.: TZ0015260408FRF12 Page 2 of 33 ** Report Revise Record ** Report Version Revise Time Issued Date Valid Version Notes V1.0 / 2026-05-28 Valid Initial release Report No.: TZ0015260408FRF12 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.: TZ0015260408FRF12 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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Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 1 of 23 Appendix Test Data for SRD (Conducted Measurement) Product Name: Wireless Mechanical Keyboard Trade Mark: Keychron, Lemokey Test Model: V3 Ultra FCC ID: 2BGKB-V3ULTRA 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 1.304 2401.312 2402.616 0.5 PASS SRD Ant1 2440 1.288 2439.352 2440.640 0.5 PASS SRD Ant1 2480 1.268 2479.360 2480.628 0.5 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 2 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 3 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 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 2.0466 2400.9639 2403.0105 --- --- SRD Ant1 2440 2.0160 2439.0025 2441.0185 --- --- SRD Ant1 2480 2.0590 2478.9677 2481.0267 --- --- Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 5 of 23 Test Graphs SRD-Ant1-2402 SRD-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 6 of 23 SRD-Ant1-2480 Appendix Test Data of the Report No.: TZ0015260408FRF12 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 1.15 ≤30 PASS SRD Ant1 2440 1.66 ≤30 PASS SRD Ant1 2480 1.53 ≤30 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 8 of 23 Test Graphs Peak SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 9 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 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 -12.52 ≤8.00 PASS SRD Ant1 2440 -10.93 ≤8.00 PASS SRD Ant1 2480 -10.92 ≤8.00 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 11 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2440-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 12 of 23 SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 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 -1.93 -33.43 ≤-21.93 PASS SRD Ant1 High 2480 -1.02 -46.32 ≤-21.02 PASS Note: offset(dB) = cable loss(dB) + attenuator factor(dB) Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 14 of 23 Test Graphs SRD-Ant1-2402-PASS SRD-Ant1-2480-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 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 -1.00 -1.00 --- PASS SRD Ant1 2402 30~1000 -1.00 -61.82 ≤-21 PASS SRD Ant1 2402 1000~26500 -1.00 -36.61 ≤-21 PASS SRD Ant1 2440 0~Reference -0.68 -0.68 --- PASS SRD Ant1 2440 30~1000 -0.68 -63.15 ≤-20.68 PASS SRD Ant1 2440 1000~26500 -0.68 -36.3 ≤-20.68 PASS SRD Ant1 2480 0~Reference -1.04 -1.04 --- PASS SRD Ant1 2480 30~1000 -1.04 -62.34 ≤-21.04 PASS SRD Ant1 2480 1000~26500 -1.04 -37.83 ≤-21.04 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.: TZ0015260408FRF12 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.: TZ0015260408FRF12 Page 17 of 23 SRD-Ant1-2402-1000~26500-PASS SRD-Ant1-2440-0~Reference-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 18 of 23 SRD-Ant1-2440-30~1000-PASS SRD-Ant1-2440-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 19 of 23 SRD-Ant1-2480-0~Reference-PASS SRD-Ant1-2480-30~1000-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 20 of 23 SRD-Ant1-2480-1000~26500-PASS Appendix Test Data of the Report No.: TZ0015260408FRF12 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.: TZ0015260408FRF12 Page 22 of 23 Test Graphs NTNV-SRD-Ant1-2402 NTNV-SRD-Ant1-2440 Appendix Test Data of the Report No.: TZ0015260408FRF12 Page 23 of 23 NTNV-SRD-Ant1-2480

Report No.: TZ0015260408FRF02 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 : TZ0015260408FRF02 Product Name : Wireless Mechanical Keyboard Model/Type reference : V3 Ultra FCC ID : 2BGKB-V3ULTRA 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 : 2026-04-29 ~ 2026-05-27 Date of Issue : 2026-05-28 Prepared by : Lena Wen Reviewed by : Allen Lai Approved by : Max Zhang (Authorized Officer) Report No.: TZ0015260408FRF02 Page 2 of 33 ** Report Revise Record ** Report Version Revise Time Issued Date Valid Version Notes V1.0 / 2026-05-28 Valid Initial release Report No.: TZ0015260408FRF02 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.: TZ0015260408FRF02 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 6/13/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BGKB-V3ULTRA 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 identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Keychron Technology (Shenzhen) 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Keychron Technology (Shenzhen) Co., Ltd. (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Nick Xu Title: CEO Company Name: Keychron Technology (Shenzhen) Co., Ltd. Date: 6/13/2026

FCC ID: 2BGKB-V3ULTRA Page 1 of 2 This report shall not be reprod…

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