2BLAE-S20Wireless Microphone

4dB 4dB 4dB 4dB 4dB 4dB 4dB 4dB 4dB 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 interference received, including interference that may cause undesired operation. NOTE 1: 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. NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Rev 1/26/2023 Dongguan Bihai Electronic Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05-09-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BLAE-S20 [Dongguan Bihai Electronic 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. [Dongguan Bihai Electronic Technology Co., Ltd.] certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Bizhen Chen Rev 1/26/2023 Dongguan Bihai Electronic Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 05-09-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BLAE-S20 [Dongguan Bihai Electronic 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Bizhen Chen

Dongguan Bihai Electronic Technology Co., Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: May 9, 2026 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BLAE-S20 Dongguan Bihai Electronic 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: Dongguan Bihai Electronic Technology Co., Ltd. FRN: 0035983402 Address: Room 1130, Building 1, No. 279, Dongcheng Section, Dongcheng Road, Dongcheng Street, Dongguan City, Guangdong Province, China Signature: Contact Person: Bizhen Chen Tel: 13538214502 Email: [email protected]

Dongguan Bihai Electronic Technology Co., Ltd. Date: May 9, 2026 Product Model Number: S20, S10 FCC ID: 2BLAE-S20 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 QAI Laboratories Ltd. 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 QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Bizhen Chen Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: 13538214502 On behalf of: Dongguan Bihai Electronic Technology Co., Ltd.

Dongguan Bihai Electronic Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: May 11, 2026 Subject; Request for Confidentiality FCC ID: 2BLAE-S20 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 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: Bizhen Chen Title: Manager

Dongguan Bihai Electronic Technology Co., Ltd. Model Difference Statement DATE: May 9, 2026 FCC ID: 2BLAE-S20 Dear Sir/Madam, Added models S10 basis of the original product S20. The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Bizhen Chen Title: Manager Company name: Dongguan Bihai Electronic Technology Co., Ltd. Address: Room 1130, Building 1, No. 279, Dongcheng Section, Dongcheng Road, Dongcheng Street, Dongguan City, Guangdong Province, China

Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report Annex A. EUT External Photos Model: S20 EUT View 1 EUT View 2 Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report EUT View 7 EUT View 8

Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample Label Size: 8mm*4mm 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 Label Location

Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report Annex B. EUT Internal Photos Model: S20 EUT Internal View 1 EUT Internal View 2 Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report EUT Internal View 3 EUT Internal View 4 SMD ANT

FCC ID: 2BLAE-S20 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 4 4(±1) 5 3.16 2480 5 0.99527 3.0 So a SAR test is not required

SMD CERAMIC ANTENNA Data Sheet CS-2450- 16 -C For 2400-2483MHz 1.6 x0.8 mm [EIA 1608 ] Type of Antenna: SMD Antenna Manufacturer: Dongguan Bihai Electronic Technology Co., Ltd. Address: Room 1130, Building 1, No. 279, Dongcheng Section, Dongcheng Road, Dongcheng Street, Dongguan City, Guangdong Province, China 参数Parameter 规格Specification 单位Units 频带 Frequency Band 2400~2483 MHz 极化 Polarization Linear *峰值增益 Peak Gain 2.36dBi *峰值效率 Peak Efficiency 72.5%% 阻抗 Impend ance 50 Ω 特征 Feature ■ 重量轻 ，结构紧凑 Light weight, compact ■ 宽带大 ，低成本 Wide bandwidth, low cost ■ 高增益内置天线 Built-in antenna with high gain ■ 工作温度 Operating Temp. : -40°C ~ +85°C 应用 Application ■ 蓝牙,无线局域网,移动电视 Bluetooth, Wireless LAN, Mobile TV ■ 家用射频系统Home RF system, etc *测试条件 ：测试板尺寸98 × 65mm； 匹配电路 ：π型匹配电路。Test condition: Test board size 98* 65 mm; Matching circuit: Pi matching circuit will be required 典型特征 Typical Characteristics Fig. 1 驻波比 VSWR 电气特性 Electrical Characteristics per line(TA =25°C) Chip Antenna TECHNOLOGY 3D 增益模式 3D Gain Pattern (2400 MHz) 辐射模式 Radiation Pattern 增益模式是在暗室进行测试的 ，被测件放在桌肩位置， 用标准的喇叭天线和矢量网络 分析 仪来收集数据 。The Gain pattern is measured in FAR -field chamber. DUT is placed on the table of rotator , a standard horn antenna and Vector Network Analyzer is used to collect data. Fig.2 暗室示意图 FAR-field Chamber Chip Antenna TECHNOLOGY 3D 增益模式 3D Gain Pattern (2500 MHz) 3D 增益模式 3D Gain Pattern (2450 MHz) Chip Antenna TECHNOLOGY 项目Item 环境Condition 规格Specification 热冲击 Thermal shock 1. 30±3 minutes at -40 ° C±5 ° C , 2. Convert to +105 ° C (5 minutes) 3. 30±3 minutes at +105 ° C±5 ° C , 4. Convert to -40 ° C (5 minutes) 5 . Total 100 continuous cycles No apparent damage Fulfill the electrical spec. after test. 抗湿性 Humidity resistance 1. Humidity: 85% R.H. 2 . Temperature: 85±5 ° C 3 . Time: 1000 hours . No apparent damage Fulfill the electrical spec. after test. 耐高温性 High temperature resistance No apparent damage Fulfill the electrical spec. after test. 1 . Temperature: 150 ° C±5 ° C 2 . Time: 1000 hours . 低温电阻 Low temperature resistance 1 . Temperature: -40 ° C±5 ° C 2 . Time: 1000 hours . No apparent damage Fulfill the electrical spec. after test. 耐焊接热性 Soldering heat resistance 1. Solder bath temperature : 260±5°C 2. Bathing time: 10±1 seconds No apparent damage 焊锡性 Solderability The dipped surface of the terminal shall be at least 95% covered with solder after dipped in solder bath of 245±5°C for 3±1 seconds . No apparent damage (2) 储存环境 Storage Condition (a)仓库 ：温度应在0～30°C之间 ，湿度应小于60%湿度 ，产品应在交货之日起1年内使用。 At warehouse: The temperature should be within 0 ~ 30°C and humidity should be less than 60% RH.The product should be used within 1 year from the time of elivery. (b)在板 ：温度应在40～85°C之间 ，湿度应小于85%湿度 。On board: The temperature should be within -40 ~85°C and humidity should be less than 85% RH. ( 3) 工作环境温度 Operating Temperature Range 工作温度范围 ：-40°C to +85°C 。 Operating temperature range : -40°C to +85°C . 推荐回流焊接曲线 Recommended Reflow Solder curve Chip Antenna TECHNOLOGY ( 1) 电烙铁的使用 Soldering Gun Procedure 以下注意事项仅针对使用电烙铁进行个别器件更换。 Note the follows, in case of using solder gun for replacement. (a) 使用小于30W的电烙铁， 温度不高于350°C，焊接时间小于3秒。 The tip temperature must be less than 350°C for the period within 3 seconds by using soldering gun under 30 W. (b) 烙铁不可直接接触器件本体。 The soldering gun tip s hall not touch this product directly. (2) 焊锡量 Soldering Volume 注意焊接过程中过多的焊锡量会损害器件本体。 Note that excess of soldering volume will easily get crack the body of this product. 产品尺寸 Product Dimension 推荐焊盘&Evaluation Board Chip Antenna TECHNOLOGY Units:mm LWHA 1.60±0.200.80±0.200.40±0.100.2±0.07 W A L A H 0 . 8 0 0.70 1.20 2.30 2.80 4.00 4 . 0 0 1 . 4 0 0 . 9 0 0 . 5 0 3.70 Unit：mm TOP Layout Note:The spacing between antenna pads should not be ＜ 1.1mm 注意:天线焊盘内间距不 能＜1.1mm External Dimensions L*W (mm) 1.6*0.8 Central Frequency 2450MHz Product Series: Chip Antenna 丝印 Marking ABCDEFLW 8.00±0.33.50± 0.051.75±0.12.00±0.054.00±0.11.50±0.12.30± 0.11.55± 0.1 编码规则 Part Number System CS - 2450 - 16-C 包装信息Package Information 应用环境 Application Guide Chip Antenna TECHNOLOGY 日期/Date 版本/Revision 版本描述/Description of changes 2022-12-2 1.0 First Version 2023-12-61.1 Modify PCB layout The contents of this data sheet are subject to change without notice . Please confirm the specifications and delivery conditions when placing your order. © Copyright 2015 , CSCURVE Electronics All rights reserved 订货信息Order Information 版本信息 Revision history Chip Antenna TECHNOLOGY Device Package Net Weight Carrier Quantity HSF Status CS-2450-16-C 1608 0.002g Tape&Reel 5000pcs RoHS compliant

Report No: SSP26040406-1E FCC Test Report Page 1 of 51 FCC TEST REPORT FCC ID: 2BLAE-S20 Report No. : SSP26040406-1E Applicant : Dongguan Bihai Electronic Technology Co., Ltd. Product Name : Wireless Microphone Model Name : S20 Test Standard : FCC Part 15.247 Date of Issue : 2026-04-25 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. Report No: SSP26040406-1E FCC Test Report Page 2 of 51 Test Report Basic Information Applicant..................................: Dongguan Bihai Electronic Technology Co., Ltd. Address of Applicant...............: Room 1130, Building 1, No. 279, Dongcheng Section, Dongcheng Road, Dongcheng Street, Dongguan City, Guangdong Province, China Manufacturer..........................: Dongguan Bihai Electronic Technology Co., Ltd. Address of Manufacturer........: Room 1130, Building 1, No. 279, Dongcheng Section, Dongcheng Road, Dongcheng Street, Dongguan City, Guangdong Province, China Product Name.........................: Wireless Microphone Brand Name.............................: - Main Model..............................: S20 Series Models..........................: S10 Test Standard..........................: FCC Part 15 Subpart C ANSI C63.4-2014 ANSI C63.10-2020 Date of Test .............................: 2026-04-20 to 2026-04-24 Test Result...............................: PASS Tested By ................................: (Walker Wu) Reviewed By............................: (Lorzix Luo) 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. Report No: SSP26040406-1E FCC Test Report Page 3 of 51 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 .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 16 5.1 Standard and Limit.............................................................................................................................................. 16 5.2 Test Procedure.................................................................................................................................................... 16 5.3 Test Data and Results .......................................................................................................................................... 18 6. Band-edge Emissions(Radiated) ............................................................................................................................... 22 6.1 Standard and Limit.............................................................................................................................................. 22 6.2 Test Procedure.................................................................................................................................................... 22 6.3 Test Data and Results ...................................................................................................…

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Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report Annex C. Test Photos Conducted Emission Test View 1 Radiated Emission Test View Below 1GHz Report No: SSP26040406-1E FCC ID: 2BLAE-S20 Annex of Test Report Radiated Emission Test View Above 1GHz