2BCMM-U3wireless microphone

Wireless Microphone Transmitter and Receiver Thank you for purchasing our wireless microphone product. Your affirmation of our product is the greatest driving force for our progress. Before using this product, please carefully read this manual. For optimal performance, charge the device before the first use. If you encounter any issues during use, please contact us. 1 2 3 1- XLR plug 2- Status display 3- USB 5V Type-c Charge 4- Power button 5- Increase or decrease volume buttons Power button: Press and hold for 3 seconds, turn on or turn off the unit. Lock ID: When both the transmitter and receiver are turn on mode, press the power button of the transmitter 3 times continuously and quickly to complete the frequency lock. 1- XLR plug 2- Status display 3- Power button 4- USB 5V Type-c Charge Power button: Press and hold for 3 seconds, turn on or turn off the unit. Basic operation of transmitter Basic operation of receiver 123 U3 Specifications: FCC ID2BCMM-U3 2.4GHz BLE Wireless connect frequency FCC Warning Statement Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

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Annex A External Photos Report No.: HK2312156125-E Page 1 of 4 Report No.: HK2312156125-E Page 2 of 4 Report No.: HK2312156125-E Page 3 of 4 Report No.: HK2312156125-E Page 4 of 4

FCC ID LABEL: Ca. 10mm x 30mm Label Location FCC ID: 2BCMM-U3

Annex B Internal Photos Report No.: HK2312156125-E Page 1 of 3 Antenna Report No.: HK2312156125-E Page 2 of 3 Report No.: HK2312156125-E Page 3 of 3

FCC RF Exposure EUT Description: wireless microphone Model No.: U3 FCC ID: 2BCMM‐U3 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)] ·[√ f(GHz)]≤3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, Where: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Frequency (MHz) Output power （ dBm） Tune Up Power （dBm） Max Tune Up power dBm/mW Min test separati on distance mm Result Limit (mW/cm 2 ) SAR Test Exclusion 2402 4.99 4±1 5/3.162 5 0.980 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2312156125‐E, antenna gain= 1.7dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine RF Exposure test exclusion. The test exclusion threshold is 0.980 which is<= 3, RF Exposure testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

Product S.Qecification _Quick Reference Date Antenna module on the system board Antenna type PCB Frequency 2.4SGHz'' Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -2.3 (Input pwr ?loss pwr) Peak EIRP(dBm) I 3 Directivity (dBi) I (all direction antenna ) Efficiency (dB) -2.3 (58.5%) Gain (dBi) 1.7 (Peak Gain X Z-plane) Maximum Power (dBm) 1.3 (XV-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-planc) Max/Mm Ratio (dB) 5.3(XY-plane) Max/Avg Ratio (dB) I.8(XY-plane) Min/Avg Ratio (dB) -3.S(XY-plane) Average Gam (dB) -0.5 (Avg Gain XY-plane) All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane !Efficiency Peak Avg.Peak Avg.Peak Avg. Module Board I 1.3 - 0 5 I. 7 -3.8 I I -3 0 58.5%

Page 1 of 44 Report No.: HK2312156125-E FCC Test Report Test Report On Behalf of Guangzhou heikuding trading company limited For wireless microphone Model No.: U3, X1, X3, X8, U1, U8, DM1, DM2, DM3, T3 FCC ID: 2BCMM-U3 Prepared For: Guangzhou heikuding trading company limited #1510, No. 136, Yingbin road, Huadu Dist., Guangzhou, China Prepared By: Shenzhen HUAK Testing Technology Co., Ltd. 1-2/F., Building B2, Junfeng Zhongcheng Zhizao Innovation Park, Heping, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Date of Test: Dec. 15, 2023 ~ Dec. 22, 2023 Date of Report: Dec. 22, 2023 Report Number: HK2312156125-E Page 2 of 44 Report No.: HK2312156125-E Test Result Certification Applicant’s Name ................... : Guangzhou heikuding trading company limited Address .................................... : #1510, No. 136, Yingbin road, Huadu Dist., Guangzhou, China Manufacturer's Name ............. : Guangzhou heikuding trading company limited Address .................................... : #1510, No. 136, Yingbin road, Huadu Dist., Guangzhou, China Product Description Trade Mark ................................. : Heikuding Product Name ............................ : wireless microphone Model and/or Type Reference .. : U3, X1, X3, X8, U1, U8, DM1, DM2, DM3, T3 Standards ................................ : 47 CFR FCC Part 15 Subpart C 15.247 KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10: 2013 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK 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. Date of Test .............................................. : Date (s) of Performance of Tests ............... : Dec. 15, 2023 ~ Dec. 22, 2023 Date of Issue ............................................. : Dec. 22, 2023 Test Result ................................................. : Pass Testing Engineer Len Liao Technical Manager Sliver Wan Authorized Signatory Jason Zhou Page 3 of 44 Report No.: HK2312156125-E Contents Page 1 Test Summary ................................................................................................................................................ 5 1.1 Test Description ......................................................................................................................................... 5 1.2 Measurement Uncertainty ......................................................................................................................... 6 1.3 Information of the Test Laboratory ............................................................................................................ 6 2 General Information ....................................................................................................................................... 7 2.1 General Description of EUT ...................................................................................................................... 7 2.2 Description of Test Conditions .................................................................................................................. 9 2.3 Description of Test Setup ........................................................................................................................ 10 2.4 Description of Support Units .................................................................................................................... 11 3 Equipments List for All Test Items ............................................................................................................. 12 4 Test Result .................................................................................................................................................... 14 4.1 Antenna Requirement.............................................................................................................................. 14 4.2 Conduction Emissions Measurement ...................................................................................................... 15 4.3 Radiated Emissions Measurement .......................................................................................................... 19 4.4 Maximum Output Power Measurement ................................................................................................... 28 4.5 Power Spectral Density ........................................................................................................................... 29 4.6 6dB Bandwidth ........................................................................................................................................ 32 4.7 Occupied Bandwidth ................................................................................................................................ 35 4.8 Band Edge ............................................................................................................................................... 36 4.9 Conducted Spurious Emissions .............................................................................................................. 38 5 Test Setup Photos ....................................................................................................................................... 42 6 Photos of the EUT ........................................................................................................................................ 44 Page 4 of 44 Report No.: HK2312156125-E ** Modified History ** Revision Description Issued Data Remark Revision 1.0 Initial Test Report Release Dec. 22, 2023 Jason Zhou Page 5 of 44 Report No.: HK2312156125-E 1 Test Summary 1.1 Test Description Test Item Test Requirement Result Antenna Requirement §15.203/§15.247(b)(4) PASS Conducted…

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