2BDOJ-COMBINE8HDRIn-Ear Monitor Transmitter Combiner

~ 50/60Hz, 3A TS DC Power Out 15V, 6A Max AC Power 100-240VAC ANT OUT IC: 31654-COMBINE4HDR FCC ID: 2BODJ-COMBINE4HDR COMBINE4 HDR 4 3 21 RF INPU Fuse: T3,15A/250V +- +- ~ 50/60Hz, 3A TS DC Power Out 15V, 6A Max AC Power 100-240VAC ANT OUT IC: 31654-COMBINE8HDR FCC ID: 2BODJ-COMBINE8HDR COMBINE8 HDR 4 3 21 RF INPU 8 7 65 Fuse: T3,15A/250V A B C A B C DD 4 4 3 3 2 2 1 1 ~ 50/60Hz, 3A TS DC Power Out 15V, 6A Max AC Power 100-240VAC ANT OUT IC: 31654-COMBINE4HDR FCC ID: 2BODJ-COMBINE4HDR COMBINE4 HDR 4 3 21 RF INPU Fuse: T3,15A/250V +- +- ~ 50/60Hz, 3A TS DC Power Out 15V, 6A Max AC Power 100-240VAC ANT OUT IC: 31654-COMBINE8HDR FCC ID: 2BODJ-COMBINE8HDR COMBINE8 HDR 4 3 21 RF INPU 8 7 65 Fuse: T3,15A/250V A B C A B C DD 4 4 3 3 2 2 1 1

MRT Technology (Shenzhen) Co., Ltd. Report No.: R26S1036056-U401 Phone: +86-755-26928918 Report Version: V01 Web: www.mrt-cert.com Issue Date: 2026-07-09 Template Version: 3.0 1 of 10 RF Exposure Evaluation Declaration FCC ID: 2BDOJ-COMBINE8HDR Applicant: RF Venue, Inc. Product: In-Ear Monitor Transmitter Combiner Model No.: Combine8 HDR Brand Name: RFVENUE FCC Rule Part(s): FCC Part 2.1091 Result: Complies Evaluation Date: 2026-06-30 Prepared By: Aurora Ding Reviewed By: Jame Yuan Approved By: Robin Wu The test results relate only to the samples tested. This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report. Testing was performed in accordance with the applicable measurement procedures. The test results reported herein apply only to the specific item(s) tested. The test report shall not be reproduced except in full without the written approval of MRT Technology (Shenzhen) Co., Ltd. Report No.: R26S1036056-U401 2 of 10 Revision History Report No. Version Description Issue Date Note R26S1036056-U401 V01 Initial Report 2026-07-09 Valid Report No.: R26S1036056-U401 3 of 10 CONTENTS Description Page 1. General Information ............................................................................................................................... 4 1.1. Applicant ........................................................................................................................................4 1.2. Manufacturer .................................................................................................................................4 1.3. Testing Facility ...............................................................................................................................4 1.4. Product Information .......................................................................................................................5 1.5. Antenna Details .............................................................................................................................5 1.6. Device Classification .....................................................................................................................5 1.7. Applied Standards .........................................................................................................................5 2. RF Exposure Evaluation ........................................................................................................................ 6 2.1. Limits .............................................................................................................................................6 2.2. MPE Exemptions ...........................................................................................................................7 2.3. Calculated Result ....................................................................................................................... 10 Report No.: R26S1036056-U401 4 of 10 1. General Information 1.1. Applicant RF Venue, Inc. 24 Walpole Park South, Unit 1, Walpole, Massachusetts, 02081 USA 1.2. Manufacturer RF Venue, Inc. 24 Walpole Park South, Unit 1, Walpole, Massachusetts, 02081 USA 1.3. Testing Facility Test Site - MRT Suzhou Laboratory Laboratory Location (Suzhou - Wuzhong) D8 Building, No.2 Tian’edang Rd., Wuzhong Economic Development Zone, Suzhou, China Laboratory Location (Suzhou - SIP) 4b Building, Liando U Valley, No.200 Xingpu Rd., Shengpu Town, Suzhou Industrial Park, China Laboratory Location (Suzhou - Wujiang) Building 1, No.1 Xingdong Road, Wujiang, Suzhou, Jiangsu, People’s Republic of China Laboratory Accreditations A2LA: 3628.01 CNAS: L10551 FCC: CN1166 ISED: CN0001 Test Site - MRT Shenzhen Laboratory Laboratory Location (Shenzhen) 1G, Building A, Junxiangda Building, Zhongshanyuan Road West, Nanshan District, Shenzhen, China Laboratory Accreditations A2LA: 3628.02 FCC: CN1284 ISED: CN0105 Report No.: R26S1036056-U401 5 of 10 1.4. Product Information Product Name In-Ear Monitor Transmitter Combiner Model No. Combine8 HDR Radio Specification Transmitter Combiner Operating Temperature -20 ~ 50 °C Antenna Information Refer to section 1.5 Power Type 120～240 V AC Note: The information of the EUT (Equipment Under Test) was provided by the manufacturer. The accuracy, completeness, and validity of the information are solely the responsibility of the manufacturer. 1.5. Antenna Details Frequency Range (MHz) Antenna Type Max Declared Peak Gain (dBi) 470 ~ 608 Dipole 4.0 Note: The product is sold without an antenna. 1.6. Device Classification According to the user manual, this device is classified as a Mobile Device. So, the RF exposure evaluation requirements of § 2.1091 for mobile device exposure conditions subject to MPE limits. 1.7. Applied Standards According to the specifications of the manufacturer, the EUT must comply with the requirements of the following standards: ⚫ FCC Part 2.1091 ⚫ KDB 447498 D04 Interim General RF Exposure Guidance v01 Report No.: R26S1036056-U401 6 of 10 2. RF Exposure Evaluation 2.1. Limits According to FCC §1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in §1.1307(b) Limits For Maximum Permissible Exposure (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Average Time (Minutes) (A) Limits for Occupational/ Control Exposures 0.3 ~ 3.0 614 1.63 *(100) ≤6 3.0 ~ 30 1842/f 4.89/f *(900/f 2 ) <6 30 ~ 300 61.4 0.163 1.0 <6 300 ~ 1500 -- -- f/300 <6 1500 ~ 100000 -- -- 5 <6 (B) Limits for General Population/ Uncontrolled Exposures 0.3 ~ 1.34 614 1.63 *(100) <30 1.34 ~ 30 824/f 2.19/f *(180/f 2 ) <30 30 ~ 300 27.5 0.073 0.2 <30 300 ~ 1500 -- -- f/1500 <30 1500 ~ 100000 -- -- 1.0 <30 f= frequency in MHz. * = Plane-wave equivalent power density. Report No.: R26S1036056-U401 7 of 10 2.2. MPE …

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MRT Technology (Shenzhen) Co., Ltd. Report No.: R26S1036056-U201 Phone: +86-755-26928918 Report Version: V01 Web: www.mrt-cert.com Issue Date: 2026-07-09 Template Version: 3.0 1 of 49 RF MEASUREMENT REPORT FCC ID: 2BDOJ-COMBINE8HDR Applicant: RF Venue, Inc. Product: In-Ear Monitor Transmitter Combiner Model No.: Combine8 HDR Brand Name: RFVENUE FCC Classification: Part 15 Wireless Microphone (DWM) FCC Rule Part(s): Part 15 Subpart C (Section 15.236) Result: Complies Received Date: 2026-05-20 Test Date: 2026-06-16 ~ 2026-06-24 Prepared By: Aurora Ding Reviewed By: Jame Yuan Approved By: Robin Wu The test results relate only to the samples tested. This equipment has been shown to be capable of compliance with the applicable technical standards as indicated in the measurement report. Testing was performed in accordance with the applicable measurement procedures. The test results reported herein apply only to the specific item(s) tested. The test report shall not be reproduced except in full without the written approval of MRT Technology (Shenzhen) Co., Ltd. Report No.: R26S1036056-U201 2 of 49 Revision History Report No. Version Description Issue Date Note R26S1036056-U201 V01 Initial Report 2026-07-09 Valid Report No.: R26S1036056-U201 3 of 49 CONTENTS Description Page 1. General Information ................................................................................................................................ 5 1.1. Applicant ...................................................................................................................................... 5 1.2. Manufacturer ................................................................................................................................ 5 1.3. Testing Facility ............................................................................................................................. 5 1.4. Product Information ...................................................................................................................... 6 1.5. Radio Specification under Test .................................................................................................... 6 1.6. Working Frequencies ................................................................................................................... 6 1.7. Input Signal .................................................................................................................................. 6 2. Test Configuration .................................................................................................................................. 7 2.1. Test Mode .................................................................................................................................... 7 2.2. Test Software ............................................................................................................................... 7 2.3. Applied Standards ........................................................................................................................ 7 2.4. Test Environment Condition ......................................................................................................... 7 3. Measuring Instrument ............................................................................................................................ 8 4. Decision Rules and Measurement Uncertainty .................................................................................... 9 4.1. Decision Rules ............................................................................................................................. 9 4.2. Measurement Uncertainty ............................................................................................................ 9 5. Test Result ............................................................................................................................................. 10 5.1. Summary .................................................................................................................................... 10 5.2. 99% Occupied Bandwidth Measurement .................................................................................... 11 5.2.1. Test Limit ..................................................................................................................................... 11 5.2.2. Test Procedure ............................................................................................................................ 11 5.2.3. Test Setting ................................................................................................................................. 11 5.2.4. Test Setup ................................................................................................................................... 11 5.2.5. Test Result .................................................................................................................................. 11 5.3. Frequency Tolerance Measurement .......................................................................................... 12 5.3.1. Test Limit .................................................................................................................................... 12 5.3.2. Test Procedure ........................................................................................................................... 12 5.3.3. Test Setting ................................................................................................................................ 12 5.3.4. Test Setup .................................................................................................................................. 13 5.3.5. Test Result ................................................................................................................................. 13 5.4. Emission Mask Measurement ..............................................................................................…

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Report No.: R26S1036056-U201 37 of 49 Test Site NS-TR2 Test Engineer Jeff Yang Test Date 2026-06-16 ~ 2026-06-17 Test Mode Mode 2 Test Frequency (MHz) Frequency Range (MHz) Max Reading Frequency (MHz) Max Reading Level (dBm) Limit (dBm) Result 470.200 30 ~ 1000 503.36000 -63.69 -54 Pass 468.200 ~ 469.400 469.25480 -74.81 -36 Pass 469.400 ~ 469.700 469.67750 -81.92 -36 Pass 470.700 ~ 471.000 470.71170 -81.11 -54 Pass 471.000 ~ 472.200 471.81120 -75.14 -54 Pass 1000 ~ 7000 3052.00000 -53.92 -30 Pass 539.000 30 ~ 1000 504.33000 -63.28 -54 Pass 537.000 ~ 538.200 538.10160 -75.97 -54 Pass 538.200 ~ 538.500 538.48560 -82.41 -54 Pass 539.500 ~ 539.800 539.54140 -82.04 -54 Pass 539.800 ~ 541.000 539.85040 -75.39 -54 Pass 1000 ~ 7000 3052.00000 -53.91 -30 Pass 607.800 30 ~ 1000 506.27000 -63.73 -54 Pass 605.800 ~ 607.000 606.87520 -75.82 -54 Pass 607.000 ~ 607.300 607.28350 -81.57 -54 Pass 608.300 ~ 608.600 608.36570 -81.48 -54 Pass 608.600 ~ 609.800 608.78120 -76.04 -54 Pass 1000 ~ 7000 3172.00000 -53.93 -30 Pass Report No.: R26S1036056-U201 38 of 49 Transmitter unwanted emissions in the spurious domain - 470.200 MHz 30 ~ 1000 MHz Note 468.200 ~ 469.400 MHz 469.400 ~ 469.700 MHz 470.700 ~ 471.000 MHz 471.000 ~ 472.200 MHz 1000 ~ 7000 MHz Note: Mark 1 is fundamental frequency that is not evaluated in this item. Report No.: R26S1036056-U201 39 of 49 Transmitter unwanted emissions in the spurious domain - 539.000 MHz 30 ~ 1000 MHz Note 537.000 ~ 538.200 MHz 538.200 ~ 538.500 MHz 539.500 ~ 539.800 MHz 539.800 ~ 541.000 MHz 1000 ~ 7000 MHz Note: Mark 1 is fundamental frequency that is not evaluated in this item. Report No.: R26S1036056-U201 40 of 49 Transmitter unwanted emissions in the spurious domain - 607.800 MHz 30 ~ 1000 MHz Note 605.800 ~ 607.000 MHz 607.000 ~ 607.300 MHz 608.300 ~ 608.600 MHz 608.600 ~ 609.800 MHz 1000 ~ 7000 MHz Note: Mark 1 is fundamental frequency that is not evaluated in this item. Report No.: R26S1036056-U201 41 of 49 Test Site NS-TR2 Test Engineer Jeff Yang Test Date 2026-06-24 Test Mode Mode 3 Test Frequency (MHz) Frequency Range (MHz) Max Reading Frequency (MHz) Max Reading Level (dBm) Limit (dBm) Result 536.000 + 537.000 + 538.000 + 539.000 + 540.000 + 541.000 + 542.000 + 543.000 30 ~ 1000 485.90000 -61.31 -54 Pass 534.000 ~ 535.200 535.19040 -67.13 -54 Pass 535.200 ~ 535.500 535.27620 -75.32 -54 Pass 543.500 ~ 543.800 543.75560 -76.62 -54 Pass 543.800 ~ 545.000 543.80120 -68.99 -54 Pass 1000 ~ 7000 3052.00000 -53.70 -30 Pass Transmitter unwanted emissions in the spurious domain 30 ~ 1000 MHz Note 534.000 ~ 535.200 MHz 535.200 ~ 535.500 MHz 543.500 ~ 543.800 MHz Report No.: R26S1036056-U201 42 of 49 Transmitter unwanted emissions in the spurious domain 543.800 ~ 545.000 MHz 1000 ~ 7000 MHz Note: Mark 1 is fundamental frequency that is not evaluated in this item. Report No.: R26S1036056-U201 43 of 49 Radiated by the cabinet and structure of the equipment: Test Site NS-AC1 Test Engineer Ted Chen Test Date 2026-06-17 ~ 2026-06-18 Test Mode Mode 1 Test Channel (MHz) Frequency (MHz) Reading Level (dBm) Substitution Factor (dB) Measure Level (dBm) Limit (dBm) Margin (dB) Detector Polarization 470.200 493.660 -92.791 31.538 -61.253 -54.000 -7.253 Peak Horizontal 539.250 -97.208 32.144 -65.064 -54.000 -11.064 Peak Horizontal 489.780 -93.100 31.126 -61.974 -54.000 -7.974 QP Vertical 536.340 -92.236 31.444 -60.792 -54.000 -6.792 QP Vertical 4741.000 -78.741 13.915 -64.826 -30.000 -34.826 Peak Horizontal 6877.000 -78.728 18.920 -59.808 -30.000 -29.808 Peak Horizontal 5671.000 -79.004 14.794 -64.210 -30.000 -34.210 Peak Vertical 6871.000 -78.403 19.241 -59.162 -30.000 -29.162 Peak Vertical 539.000 492.690 -92.090 31.487 -60.603 -54.000 -6.603 Peak Horizontal 789.025 -95.773 34.494 -61.279 -54.000 -7.279 Peak Horizontal 496.085 -88.844 31.364 -57.480 -54.000 -3.480 Peak Vertical 627.035 -93.606 32.263 -61.343 -54.000 -7.343 Peak Vertical 6112.000 -78.631 16.331 -62.300 -30.000 -32.300 Peak Horizontal 6973.000 -79.196 19.763 -59.433 -30.000 -29.433 Peak Horizontal 5179.000 -78.329 14.201 -64.128 -30.000 -34.128 Peak Vertical 6946.000 -79.830 19.880 -59.950 -30.000 -29.950 Peak Vertical 607.800 500.450 -92.498 31.708 -60.790 -54.000 -6.790 Peak Horizontal 536.340 -97.462 32.146 -65.316 -54.000 -11.316 Peak Horizontal 495.115 -93.800 31.302 -62.498 -54.000 -8.498 QP Vertical 536.340 -90.500 31.444 -59.056 -54.000 -5.056 QP Vertical 5185.000 -78.344 14.012 -64.332 -30.000 -34.332 Peak Horizontal 6961.000 -79.226 19.705 -59.521 -30.000 -29.521 Peak Horizontal 6112.000 -79.461 16.595 -62.866 -30.000 -32.866 Peak Vertical 6883.000 -78.048 19.145 -58.903 -30.000 -28.903 Peak Vertical Note 1: Measure Level (dBm) = Reading Level (dBm) + Substitution Factor (dB) Note 2: Substitution Factor (dB) = Cable Loss (dB) + Space Attenuation (dB) - Antenna Gain (dBi) - 2.15 (dB) Note 3: QP measurement was not performed when peak measure level was lower than the QP limit. RMS measurement was not performed when peak measure level was lower than the RMS limit. Report No.: R26S1036056-U201 44 of 49 Test Site NS-AC1 Test Engineer Ted Chen Test Date 2026-06-17 ~ 2026-06-18 Test Mode Mode 2 Test Channel (MHz) Frequency (MHz) Reading Level (dBm) Substitution Factor (dB) Measure Level (dBm) Limit (dBm) Margin (dB) Detector Polarization 470.200 501.420 -92.986 31.713 -61.273 -54.000 -7.273 Peak Horizontal 788.540 -96.158 34.496 -61.662 -54.000 -7.662 Peak Horizontal 493.175 -92.900 31.228 -61.672 -54.000 -7.672 QP Vertical 535.855 -90.600 31.442 -59.158 -54.000 -5.158 QP Vertical 4597.000 -78.331 13.043 -65.288 -30.000 -35.288 Peak Horizontal 6952.000 -79.536 19.772 -59.764 -30.000 -29.764 Peak Horizontal 5911.000 -77.681 15.498 -62.183 -30.000 -32.183 Peak Vertical 6949.000 -79.809 19.930 -59.879 -30.000 -29.879 Peak Vertical 539.000 496.570 -93.281 31.671 -61.610 -54.000 -7.610 Peak Horizontal 788.540 -94.779 34.496 -60.283 -54.000 -6.283 Peak Horizontal 495.115 -88.312 31.302 -57.010 -54.000 -3.010 Peak Vert…

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