2A3MI-C520Wireless Lavalier Microphone

1 Power switch：Long press for 2S to turn on off the power，Double-click the power switch to enter the silent mode. 2 Pairing Indicators: ① When the connection is successful, the indicator light will be on continuously. ② Slow flashing indicator when connection fails. ③ Indicator light flashes quickly when the microphone is muted. 3 Charging indicator： ① The red light starts flashing to indicate a low battery level. ② The red light is always on when charging, and the red light is off when fully charged. 4 USB-C port: Standard USB-C port for charging. 5 Pocket clip: It can be used directly on the collar. 6 External microphone input port: Standard 3.5 mm TRS microphone input. 7 Built-in microphone：Built-in high-quality noise reduction microphone for direct sound pickup. 8 Forced shutdown button: In case of machine crash, press this button to restart the machine (you need to use a pin to insert this hole and click the button). 9 Power switch：Long press for 2S to turn on off the power，Double-click the power switch to enter the silent mode. 10 Display: A Signal strength display B Disconnection Successful connection C Battery level display D Volume level display E Noise reduction level display F Volume display track 11 Volume button: The volume level can be adjusted by pressing the "dB" button, with five built-in levels, each increasing the volume by 3 dB, and the level can be seen on the display. 12 Noise Reduction Button: The noise reduction intensity can be adjusted by pressing the "A" button, with five built-in gears that can be seen on the display. 13 USB-C port: Standard USB-C port for charging. 14 Monitor port: Plug in 3.5mm headphones to monitor the sound of the microphone. 15 Output port: The receiver is connected to the device (mobile phone/camera/computer, etc.) through the audio cable, with the elbow end of the cable plugged into the audio output port of the RX and the straight end connected to the recording device. There are two connection cables, the cable with the phone logo is used to connect the phone and the cable with the camera logo is used to connect the camera and the camcorder. 16 Forced shutdown button: In case of machine crash, press this button to restart the machine (you need to use a pin to insert this hole and click the button). 17 Pocket clip: You can clip the product belt clip to the hot shoe of the SLR camera directly. Characteristic Compact size and easy to carry. Wireless connection, automatic pairing on power on, and at the same time can be used one to one, one to two. Automatic frequency pairing and connection between transmitter and receiver, no need for complicated debugging. Built-in HD noise reduction chip, effectively reduce environmental noise, while supporting manual multi-level noise reduction to cope with different use scenarios. TFT display screen, clear and intuitive display of the parameters. Using 2.4G global wireless frequency band transmission. Widely compatible with digital or SLR cameras, portable video cameras, recorders, tablet PCs, cell phones. Built-in lithium battery, using USB5V charging. System Parameters Transmission frequency band: 2403MHz～2478MHz Audio frequency response: 20Hz～20KHz Signal to Noise Ratio:90 dB Maximum input voltage:135 dB SPL Pairing type: Automatic Working temperature: -10°C～50°C Microphone directivity: omnidirectional Sample rate: 48KHz Effective working distance: 30 m (Indoor linear distance) 150 m (Space without obstructions) Dimensions: TX:45*47*15mm RX:50*52*17mm Connection methods 1 Receiver and cell phone connection: FCC Warning 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 inte rference received, including interference that may cause undesired operation. Changes or modifications 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 interferenceto 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.

jinanshiyongyoukasongtuliaoyouxiangongsi Agent Authorization Company: jinanshiyongyoukasongtuliaoyouxiangongsi Address:shandongshengjinanshitianqiaoquhuangtaihuanqiujiajubolanzhongxinA- C7033,C7023-1 Product Name: Wireless Lavalier Microphone Trade Mark: Cekaso Model Number(s): C520 FCC ID: 2A3MI-C520 We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2021-11-17 Name: Hai Ju Lin Title: Manager Company: jinanshiyongyoukasongtuliaoyouxiangongsi

jinanshiyongyoukasongtuliaoyouxiangongsi Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date:2021-11-17 Subject; Request for Confidentiality FCC ID: 2A3MI-C520 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Declaration of Software Security Requirements For U-NII Devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Hai Ju Lin Title: Manager

Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 4 EXTERIOR PHOTOGRAPHS Fig.1 Fig.2 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 4 Fig.3 Fig.4 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 4 Fig.5 Fig.6 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 4 Fig.7

Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 _____________________________________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 1 LABEL AND LOCATION (Size: L4.0cm x 0.5cm) Material: Tagboard Glue: adhesive sticker Font color: Blue Label color: White Label Location Wireless Lavalier Microphone Model: C520 FCC ID: 2A3MI-C520 Input: DC 5V, 1A DC 3.7V by Rechargeable Li-ion Battery, 450mAh

Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 3 INTERIOR PHOTOGRAPHS Fig.1 Fig.2 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 3 Fig.3 Fig.4 Antenna Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 ________________________________________________________________________________ _________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 3 Fig.5 Fig.6

Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 Report No.: LCS211103044AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 33 FCC TEST REPORT FOR jinanshiyongyoukasongtuliaoyouxiangongsi Wireless Lavalier Microphone Test Model: C520 Prepared for : jinanshiyongyoukasongtuliaoyouxiangongsi Address : shandongshengjinanshitianqiaoquhuangtaihuanqiujiajubolanzhongxinA-C7033,C 7023-1 Prepared by : Shenzhen LCS Compliance Testing Laboratory Ltd Address : 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel : (+86)755-82591330 Fax : (+86)755-82591332 Web : www.LCS-cert.com Mail : [email protected] Date of receipt of test sample : November 08, 2021 Number of tested samples : 2 Sample number : Prototype Date of Test : November 08, 2021 ~ November 12, 2021 Date of Report : November 16, 2021 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 Report No.: LCS211103044AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 33 FCC TEST REPORT FCC CFR 47 PART 15 C (15.249) Report Reference No. ...................... : LCS211103044AEA Date of Issue ........................................ : November 16, 2021 Testing Laboratory Name ................. : Shenzhen LCS Compliance Testing Laboratory Ltd. Address ................................................ : 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Testing Location/ Procedure ................ : Full application of Harmonised standards ■ Partial application of Harmonised standards □ Other standard testing method □ Applicant’s Name ............................... : jinanshiyongyoukasongtuliaoyouxiangongsi Address ................................................ : shandongshengjinanshitianqiaoquhuangtaihuanqiujiajubolanzhongxinA-C 7033,C7023-1 Test Specification Standard ............................................... : FCC CFR 47 PART 15 C(15.249) / ANSI C63.10: 2013 Test Report Form No. .......................... : LCSEMC-1.0 TRF Originator .................................... : Shenzhen LCS Compliance Testing Laboratory Ltd. Master TRF .......................................... : Dated 2011-03 Shenzhen LCS Compliance Testing Laboratory Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen LCS Compliance Testing Laboratory Ltd. is acknowledged as copyright owner and source of the material. Shenzhen LCS Compliance Testing Laboratory 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. ....................... : Wireless Lavalier Microphone Trade Mark .......................................... : Cekaso Test Model ........................................... : C520 Ratings ................................................. : Input: DC 5V,1A DC 3.7V by Rechargeable Li-ion Battery, 450mAh Result ................................................ : Positive Compiled by: Supervised by: Approved by: Jack Liu/ Administrator Jin Wang/ Technique principal Gavin Liang/ Manager Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 Report No.: LCS211103044AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 33 FCC -- TEST REPORT Test Result Positive 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. Test Report No. : LCS211103044AEA November 16, 2021 Date of issue Test Model.............................. : C520 EUT......................................... : Wireless Lavalier Microphone Applicant............................... : jinanshiyongyoukasongtuliaoyouxiangongsi Address.................................. : shandongshengjinanshitianqiaoquhuangtaihuanqiujiajubolanzhongxinA-C 7033、C7023-1 Telephone............................... : / Fax.......................................... : / Manufacturer........................ : Shenzhen Point Mill Technology Co., Ltd Address................................... : 4F, Building B, No.49 Baoli Road, Buji Street, Longgang District, Shenzhen, Guangdong, China Telephone............................... : / Fax.......................................... : / Factory................................... : Shenzhen Point Mill Technology Co., Ltd Address................................... : 4F, Building B, No.49 Baoli Road, Buji Street, Longgang District, Shenzhen, Guangdong, China Telephone............................... : / Fax.......................................... : / Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 Report No.: LCS211103044AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 4 of 33 Revision History Revision Issue Date Revisions Revised By 000 November 16, 2021 Initial Issue Gavin Liang Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 Report No.: LCS211103044AEA This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 5 of 33 TABLE OF CONTENTS 1. GENERAL INFORMATION .................................................................................................. 6 1.1 Description of Device (EUT) ............................................................................................................ 6 1.2. Support Equipment List ................................................................................…

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Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 _______________________________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 2 Test Setup Photos of the EUT Test Setup Photo(s) of Radiated Emissions Measurement Fig. 1 Fig. 2 Shenzhen LCS Compliance Testing Laboratory Ltd. FCC ID: 2A3MI-C520 _______________________________________________________________________________________________ This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 2 Test Setup Photo(s) of Conducted Emissions Measurement Fig. 3