2BG35-O1TWS wireless headset

Shenzhen Mushroom Electricity Technology Co., LTD Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: June 15, 2024 FCC ID: 2BG35-O1 Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing Shenzhen Mushroom Electricity Technology Co., LTD 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing Shenzhen Mushroom Electricity Technology Co., LTD certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Applicant: Shenzhen Mushroom Electricity Technology Co., LTD Address: Room 201, Building E, Phase II, Xinghe WORLD, Minle Community, Minzhi Street, Longhua, Shenzhen, China Contact Person: Miss Wei Tel.: +86-13622365160 Email: [email protected] Sincerely, Signature:

Shenzhen Mushroom Electricity Technology Co., LTD U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: 06-15-2024 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BG35-O1 Shenzhen Mushroom Electricity Technology Co., LTD (“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: Shenzhen Mushroom Electricity Technology Co., LTD FRN: 0035576115 Address: Room 201, Building E, Phase II, Xinghe WORLD, Minle Community, Minzhi Street, Longhua, Shenzhen, China Signature: Contact Person: Miss Wei Tel: +86-13622365160 Email: [email protected]

Shenzhen Mushroom Electricity Technology Co., LTD Date: June 15, 2024 Product Model Number: Avatar 50 Pro FCC ID: 2BG35-O1 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that ORGANIZATION. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by ORGANIZATION. on our behalf shall have the same effect as acts of our own. By: Miss Wei Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: +86-13622365160 On behalf of: Shenzhen Mushroom Electricity Technology Co., LTD

Shenzhen Mushroom Electricity Technology Co., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: June 19, 2024 Subject; Request for Confidentiality FCC ID: 2BG35-O1 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 Software Security Requirements for UNII 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: Miss Wei Title: Manager

CCUT Testing & Certification Report No: SSP24060076-2A Antenna Test Report Page 1 of 5 Antenna Test Report Report No. : SSP24060076-2A Manufacturer : Shenzhen Mushroom Electricity Technology Co., LTD Product Name : 2.4GHz Antenna Model Name : O1 Test Standard : IEEE 149-1979 Tested Date : 2024-06-06 Issued Date : 2024-06-07 Tested By : William Liu(Engineer) Approved By : Lahm Peng (Manager) Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. CCUT Testing & Certification Report No: SSP24060076-2A Antenna Test Report Page 2 of 5 1. General Inf ormation 1.1 Product Information Manufacturer: Shenzhen Mushroom Electricity Technology Co., LTD Address of Manufacturer: Room 201, Building E, Phase II, Xinghe WORLD, Minle Community, Minzhi Street, Longhua, Shenzhen, China Product Name: 2.4GHz Antenna Model Name: O1 Frequency Range: 2402MHz - 2480MHz Type of Antenna: SMD Antenna Antenna Gain: 2.67dBi (Max.) Impedance: 50 ohm Antenna View: Length * Width (2mm * 1.6mm) 1.2 Test Facilities Laboratory Name: Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China All measurement facilities used to collect the measurement data are located at 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China. CCUT Testing & Certification Report No: SSP24060076-2A Antenna Test Report Page 3 of 5 1.3 List of Measurement Instruments Description Manuf acturer Model Serial Number Cal. Date Due. Date Horn Antenna SCHWARZBECK BBHA 9120D 02553 2023-08-05 2024-08-04 Spectrum Analyzer KEYSIGHT N9020A MY48030972 2023-07-31 2024-07-30 Amplifier Agilent 8449B 3008A01520 2023-07-31 2024-07-30 Vector Network Analyzer Agilent E5071B MY42404001 2023-07-31 2024-07-30 1.4 Measurement Uncertainty Parameter Conditions Uncertainty Radiated Emissions Power 100MHz ~ 6GHz ±3.38 dB 1.5 Test Methodology All measurements contained in this report were conducted with standards IEEE 149-1979 for IEEE Standard Test Procedures for Antennas. 1.6 Test Setup CCUT Testing & Certification Report No: SSP24060076-2A Antenna Test Report Page 4 of 5 2. OTA Test 2.1 Gain Frequency Peak Gain (dBi) Polarity 2402MHz 2.67 Horizontal 2402MHz 1.57 Vertical 2442MHz -0.18 Horizontal 2442MHz -0.5 Vertical 2480MHz -0.3 Horizontal 2480MHz -0.45 Vertical CCUT Testing & Certification Report No: SSP24060076-2A Antenna Test Report Page 5 of 5 2.2 Radiation Pattern View ***** END OF REPORT *****

Report No: SSP24060076-1E FCC ID: 2BG35-O1 Annex of Test Report Annex A. EUT External Photos EUT View 1 EUT View 2 Report No: SSP24060076-1E FCC ID: 2BG35-O1 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP24060076-1E FCC ID: 2BG35-O1 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP24060076-1E FCC ID: 2BG35-O1 Annex of Test Report EUT View 7

Report No: SSP24060076-1E FCC ID: 2BG35-O1 Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

FCC ID: 2BG35-O1 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For BR+EDR Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 1.91 1(±1) 2 1.585 2402 5 0.49129 3.0 So a SAR test is not required

CCUT Testing & Certification Report No: SSP24060076-1E FCC Test Report Page 1 of 45 FCC TEST REPORT FCC ID: 2BG35-O1 Report No. : SSP24060076-1E Applicant : Shenzhen Mushroom Electricity Technology Co., LTD Product Name : TWS wireless headset Model Name : O1 Test Standard : FCC Part 15.247 Date of Issue : 2024-06-15 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. CCUT Testing & Certification Report No: SSP24060076-1E FCC Test Report Page 2 of 45 Test Report Basic Information Applicant..................................: Shenzhen Mushroom Electricity Technology Co., LTD Address of Applicant...............: Room 201, Building E, Phase II, Xinghe WORLD, Minle Community, Minzhi Street, Longhua, Shenzhen, China Manufacturer..........................: Shenzhen Mushroom Electricity Technology Co., LTD Address of Manufacturer........: Room 201, Building E, Phase II, Xinghe WORLD, Minle Community, Minzhi Street, Longhua, Shenzhen, China Product Name.........................: TWS wireless headset Brand Name.............................: OSKULL Main Model..............................: O1 Series Models..........................: - Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2013 Date of Test .............................: 2024-06-12 to 2024-06-14 Test Result...............................: PASS Tested By ................................: (Walker Wu) Reviewed By............................: (Lieber Ouyang) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. CCUT Testing & Certification Report No: SSP24060076-1E FCC Test Report Page 3 of 45 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................8 2. Summary of Test Results .............................................................................................................................................9 3. Antenna Requirement ............................................................................................................................................... 10 3.1 Standard and Limit.............................................................................................................................................. 10 3.2 Test Result .......................................................................................................................................................... 10 4. Conducted Emissions ................................................................................................................................................ 11 4.1 Standard and Limit.............................................................................................................................................. 11 4.2 Test Procedure.................................................................................................................................................... 11 4.3 Test Data and Results .......................................................................................................................................... 12 5. Radiated Emissions ................................................................................................................................................... 15 5.1 Standard and Limit.............................................................................................................................................. 15 5.2 Test Procedure.................................................................................................................................................... 15 5.3 Test Data and Results .......................................................................................................................................... 17 6. Band-edge Emissions(Radiated) ............................................................................................................................... 21 6.1 Standard and Limit.............................................................................................................................................. 21 6.2 Test Procedure.................................................................................................................................................... 21 6.3 Test Data and Results ............................................…

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