2BWHK-YK03White Noise Machine

White Noise Machine YK03 Parameter: Key Instruction Left View Top View Right View Power On/Off Mode Switch Volume Volume +. Previous Melody Next Melody Recharging Timer Set Timer Indicators FCC Warnning: 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. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. 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. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body.

FCC ID: 2BWHK-YK03 External Photos of the EUT FCC ID: 2BWHK-YK03 FCC ID: 2BWHK-YK03

Label and Location Size: L: 2.0cm*W: 1.0cm Label and Location FCC ID: 2BWHK-YK03

FCC ID: 2BWHK-YK03 Internal Photos of the EUT FCC ID: 2BWHK-YK03 Antenna FCC ID: 2BWHK-YK03

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : CTA26051400902 2BWHK-YK03 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : May 25, 2026 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ............................ : Shenzhen Meisenkai Electronics Co., Ltd. Address............................................ : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purpses as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology 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. Test item description ..................... : White Noise Machine Trade Mark ....................................... : N/A Manufacturer .................................... : Shenzhen Meisenkai Electronics Co., Ltd. Model/Type reference ...................... : YK03 Listed Models ................................... : YK01, YK02, YK04, YK05, YK06, YK07, YK08 Rating ............................................... : Input: DC 5V Battery: 3.7V 1800mAh Result ............................................... : PASS Report No.: CTA26051400902 Page 2 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : White Noise Machine Model /Type : YK03 Listed Models : YK01, YK02, YK04, YK05, YK06, YK07, YK08 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. So the tests were performed on model YK03 and the test results for the main test model can cover the listed models. Applicant : Shenzhen Meisenkai Electronics Co., Ltd. Address : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Manufacturer : Shenzhen Meisenkai Electronics Co., Ltd. Address : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA26051400902 Page 3 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ............................................................................................................ 4 2 SUMMARY .......................................................................................................................... 5 2.1 General Remarks ..................................................................................................... 5 2.2 Product Description ................................................................................................. 5 2.3 Special Accessories ................................................................................................. 5 2.4 Modifications ............................................................................................................ 5 3 TEST ENVIRONMENT ....................................................................................................... 6 3.1 Address of the test laboratory .................................................................................. 6 3.2 Test Facility .............................................................................................................. 6 3.3 Statement of the measurement uncertainty ............................................................. 6 4 Test limit .............................................................................................................................. 7 4.1 Requirement ............................................................................................................ 7 4.2 Conducted Power Results ....................................................................................... 7 4.3 Manufacturing tolerance .......................................................................................... 8 4.4 Evaluation Result ..................................................................................................... 8 4.5 Simultaneous Transmission for SAR Exclusion ...................................................... 8 5 Conclusion ....................................................................…

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Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. ........................................... : CTA26051400901 2BWHK-YK03 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : May 25, 2026 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ........................... : Shenzhen Meisenkai Electronics Co., Ltd. Address ............................................ : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Test specification ........................... : Standard ........................................... : FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology 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. Test item description ..................... : White Noise Machine Trade Mark ....................................... : N/A Manufacturer .................................... : Shenzhen Meisenkai Electronics Co., Ltd. Model/Type reference ...................... : YK03 Listed Models ................................... : YK01, YK02, YK04, YK05, YK06, YK07, YK08 Modulation ....................................... : GFSK, Π/4DQPSK Frequency ........................................ : From 2402MHz to 2480MHz Ratings ............................................. : Input: DC 5V Battery: 3.7V 1800mAh Result ............................................... : PASS Report No.: CTA26051400901 Page 2 of 38 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : White Noise Machine Model /Type : YK03 Listed Models : YK01, YK02, YK04, YK05, YK06, YK07, YK08 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. So the tests were performed on model YK03 and the test results for the main test model can cover the listed models. Applicant : Shenzhen Meisenkai Electronics Co., Ltd. Address : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Manufacturer : Shenzhen Meisenkai Electronics Co., Ltd. Address : Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA26051400901 Page 3 of 38 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ...................................................................................................................................... 4 2 SUMMARY .................................................................................................................................................... 5 2.1 General Remarks .............................................................................................................................. 5 2.2 Product Description ........................................................................................................................... 5 2.3 Equipment Under Test ....................................................................................................................... 5 2.4 Short description of the Equipment under Test (EUT) ...................................................................... 5 2.5 EUT configuration .............................................................................................................................. 6 2.6 EUT operation mode ......................................................................................................................... 6 2.7 Block Diagram of Test Setup ............................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) ......................................................................................................... 6 2.9 Modifications ...................................................................................................................................... 6 3 TEST ENVIRONMENT ................................................................................................................................. 7 3.1 Address of the test laboratory .......................................................................................…

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1 FCC Appendix RF Test Data for BT FCC ID : 2BWHK-YK03 Company : Shenzhen Meisenkai Electronics Co., Ltd. EUT : White Noise Machine Model Number : YK03 Report No. : CTA26051400901 Reviewed By : Eric Wang 2 Appendix A: 20dB Emission Bandwidth Test Result TestMode Antenna Freq(MHz) 20dB EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.954 2401.502 2402.456 --- --- 2441 0.963 2440.499 2441.462 --- --- 2480 0.969 2479.496 2480.465 --- --- 2DH5 Ant1 2402 1.317 2401.310 2402.627 --- --- 2441 1.323 2440.304 2441.627 --- --- 2480 1.323 2479.304 2480.627 --- --- 3 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 4 2DH5_Ant1_2402 2DH5_Ant1_2441 5 2DH5_Ant1_2480 6 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Freq(MHz) OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.86369 2401.5369 2402.4006 --- --- 2441 0.85734 2440.5370 2441.3943 --- --- 2480 0.87128 2479.5356 2480.4069 --- --- 2DH5 Ant1 2402 1.1682 2401.3825 2402.5507 --- --- 2441 1.1824 2440.3760 2441.5584 --- --- 2480 1.1749 2479.3799 2480.5548 --- --- 7 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 8 2DH5_Ant1_2402 2DH5_Ant1_2441 9 2DH5_Ant1_2480 10 Appendix C: Maximum conducted output power Test Result Peak Test Mode Antenna Freq(MHz) Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict DH5 Ant1 2402 0.20 ≤20.97 PASS 2441 -0.02 ≤20.97 PASS 2480 -0.57 ≤20.97 PASS 2DH5 Ant1 2402 0.94 ≤20.97 PASS 2441 0.73 ≤20.97 PASS 2480 0.22 ≤20.97 PASS 11 Appendix D: Carrier frequency separation Test Result TestMode Antenna Freq(MHz) Result[MHz] Limit[MHz] Verdict DH5 Ant1 Hop 1.006 ≥0.969 PASS 2DH5 Ant1 Hop 1.32 ≥0.882 PASS 12 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop 13 Appendix E: Time of occupancy Test Result TestMode Antenna Freq(MHz) BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.405 317 0.128 ≤0.4 PASS DH3 Ant1 Hop 1.661 163 0.271 ≤0.4 PASS DH5 Ant1 Hop 2.910 110 0.32 ≤0.4 PASS 2DH1 Ant1 Hop 0.415 318 0.132 ≤0.4 PASS 2DH3 Ant1 Hop 1.667 161 0.268 ≤0.4 PASS 2DH5 Ant1 Hop 2.915 100 0.292 ≤0.4 PASS 14 Test Graphs DH1_Ant1_Hop DH3_Ant1_Hop 15 DH5_Ant1_Hop 16 2DH1_Ant1_Hop 2DH3_Ant1_Hop 17 2DH5_Ant1_Hop 18 19 Appendix F: Number of hopping channels Test Result TestMode Antenna Freq(MHz) Result[Num] Limit[Num] Verdict DH5 Ant1 Hop 79 ≥15 PASS 2DH5 Ant1 Hop 79 ≥15 PASS 20 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop 21 Appendix G: Band edge measurements Test Result TestMode Antenna ChName Freq(MHz) RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 Low 2402 -0.26 -55.19 ≤-20.26 PASS High 2480 -1.23 -55.95 ≤-21.23 PASS Low Hop_2402 -0.78 -56.9 ≤-20.78 PASS High Hop_2480 -1.02 -56.46 ≤-21.02 PASS 2DH5 Ant1 Low 2402 -0.44 -56.83 ≤-20.44 PASS High 2480 -0.96 -57.17 ≤-20.96 PASS Low Hop_2402 -3.76 -57.76 ≤-23.76 PASS High Hop_2480 -0.96 -57.1 ≤-20.96 PASS 22 Test Graphs DH5_Ant1_Low_2402 DH5_Ant1_High_2480 DH5_Ant1_Low_Hop_2402 23 DH5_Ant1_High_Hop_2480 2DH5_Ant1_Low_2402 24 2DH5_Ant1_High_2480 2DH5_Ant1_Low_Hop_2402 2DH5_Ant1_High_Hop_2480 25 26 Appendix H: Conducted Spurious Emission Test Result TestMode Antenna Freq(MHz) FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 Reference -0.99 -0.99 --- PASS 30~1000 -0.99 -67.71 ≤-20.99 PASS 1000~26500 -0.99 -30.09 ≤-20.99 PASS 2441 Reference -1.20 -1.20 --- PASS 30~1000 -1.20 -68.22 ≤-21.2 PASS 1000~26500 -1.20 -30.49 ≤-21.2 PASS 2480 Reference -1.15 -1.15 --- PASS 30~1000 -1.15 -67.35 ≤-21.15 PASS 1000~26500 -1.15 -29.05 ≤-21.15 PASS 2DH5 Ant1 2402 Reference -2.38 -2.38 --- PASS 30~1000 -2.38 -68.29 ≤-22.38 PASS 1000~26500 -2.38 -30.23 ≤-22.38 PASS 2441 Reference -4.12 -4.12 --- PASS 30~1000 -4.12 -67.82 ≤-24.12 PASS 1000~26500 -4.12 -29.67 ≤-24.12 PASS 2480 Reference -5.60 -5.60 --- PASS 30~1000 -5.60 -66.85 ≤-25.6 PASS 1000~26500 -5.60 -30.31 ≤-25.6 PASS 27 Test Graphs DH5_Ant1_2402_0~Reference DH5_Ant1_2402_30~1000 DH5_Ant1_2402_1000~26500 28 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 29 DH5_Ant1_2441_1000~26500 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 30 DH5_Ant1_2480_1000~26500 2DH5_Ant1_2402_0~Reference 31 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 2DH5_Ant1_2441_0~Reference 32 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 33 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 34 35 Appendix I: Duty Cycle Test Result TestMode Antenna Freq(MHz) ON Time [ms] Period [ms] DC [%] xFactor Limit Verdict DH5 Ant1 2402 2.91 3.74 77.81 1.09 --- --- 2441 2.91 3.74 77.81 1.09 --- --- 2480 2.91 3.75 77.60 1.10 --- --- 2DH5 Ant1 2402 2.92 3.75 77.87 1.09 --- --- 2441 2.92 3.75 77.87 1.09 --- --- 2480 2.92 3.75 77.87 1.09 --- ---

36 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 37 2DH5_Ant1_2402 2DH5_Ant1_2441 38 2DH5_Ant1_2480 39 Appendix J: Emissions in Restricted Bands Test Result TestMod e Antenn a ChNam e Freq(MH z) Detector Freq [MHz] Result [dBm] Gain [dB] DC Factor [dB] Result [dBuV/m] Limit [dBuV/m] Verdict DH5 Ant1 Low 2402 AV 2310.000 -59.61 2.00 1.09 38.68 ≤54 PASS AV 2381.375 -58.99 2.00 1.09 39.30 ≤54 PASS AV 2390.000 -59.17 2.00 1.09 39.12 ≤54 PASS Peak 2310.000 -51.98 2.00 0.00 45.22 ≤74 PASS Peak 2363.735 -48.65 2.00 0.00 48.55 ≤74 PASS Peak 2390.000 -51.99 2.00 0.00 45.21 ≤74 PASS High 2480 AV 2483.500 -57.83 2.00 1.10 40.47 ≤54 PASS AV 2483.920 -57.38 2.00 1.10 40.92 ≤54 PASS AV 2500.000 -59.14 2.00 1.10 39.16 ≤54 PASS Peak 2483.500 -49.28 2.00 0.00 47.92 ≤74 PASS Peak 2483.680 -48.18 2.00 0.00 49.02 ≤74 PASS Peak 2500.000 -52.08 2.00 0.00 45.12 ≤74 PASS 2DH5 Ant1 Low 2402 AV 2310.000 -59.85 2.00 1.09 38.44 ≤54 PASS AV 2377.070 -59.05 2.00 1.09 39.24 ≤54 PASS AV 2390.000 -59.28 2.00 1.09 39.01 ≤54 PASS Peak 2310.000 -52.08 2.00 0.00 45.12 ≤74 PASS Peak 2319.845 -48.46 2.00 0.00 48.74 ≤74 PASS Peak 2390.000 -51.02 2.00 0.00 46.18 ≤74 PASS High 2480 AV 2483.500 -57.72 2.00 1.09 40.57 ≤54 PASS AV 2483.760 -57.52 2.00 1.09 40.77 ≤54 PASS AV 2500.000 -59.25 2.00 1.09 39.04 ≤54 PASS Peak 2483.500 -50.33 2.00 0.00 46.87 ≤74 PASS Peak 2490.560 -47.84 2.00 0.00 49.36 ≤74 PASS Peak 2500.000 -51.85 2.00 0.00 45.35 ≤74 PASS Note： 1. The limit in dBm for average detector is conversion from 54dBuV/m, according to 15.209(a). The limit in dBm for peak detector is 20dB above the limit of average detector in dBm. 40 Test Graphs DH5_Ant1_Low_2402_AV DH5_Ant1_Low_2402_Peak DH5_Ant1_High_2480_AV 41 DH5_Ant1_High_2480_Peak 2DH5_Ant1_Low_2402_AV 42 2DH5_Ant1_Low_2402_Peak 2DH5_Ant1_High_2480_AV 2DH5_Ant1_High_2480_Peak 43

1. Antenna Description: Antenna type PCB antenna Model YK03 Frequency range 2402MHz~2480MHz Manufacturer Shenzhen Meisenkai Electronics Co., Ltd. Address Room 201, No. 72 Dongfu Road, Hongxing Community, Songgang Subdistrict, Bao'an District, Shenzhen, China ANT Peak Gain 0.69 dBi 2. Antenna Photo: Length: 19.08mm Width: 7.19mm 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071B connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods 4．Antenna Radiation Pattern 2400MHz 2450MHz 2500MHz

FCC ID: 2BWHK-YK03 Test Setup Photos of the EUT FCC ID: 2BWHK-YK03