2BBOI-WS1870Wireless Speaker

FCC STATEMENT 1. 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. (2) This device must accept any interference received, including interference that may cause undesired operation. 2. 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 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. RF warning statement: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

Huizhou huayusi Technology Co., Ltd * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Mar 11, 2024 Canada ATTN.: Reviewing Engineer Per section 2.911(d)(7) of the FCC rules, FCC ID: 2BBOI-WS1870 FRN:0033892787 Huizhou huayusi Technology Co., Ltd certifies that the equipment for which authorization is sought is designated to the following U.S. Designated agent* for service of process: Company Name: Phuntion LLC Physical U.S. Company Address: 25214 Spectrum, Irvine, CA92618 Agent name: Jun.Tian Agent Email Address: [email protected] FRN: 0033422403 The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed: Designated Agent Signed: (Required, if different to Applicant): Signed: Signed: Printed name: Huanhuan.chen Printed name: Jun.Tian Title: Manager Title: CEO Company Name: Huizhou huayusi Technology Company Name: Phuntion LLC Date: Co., Ltd Mar 11, 2024 Date: Mar 11, 2024

Huizhou huayusi Technology Co., Ltd Covered Equipment Certification Attestation Letter Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 3/11/2024 Canada ATTN.: Reviewing Engineer Huizhou huayusi Technology Co., Ltd (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an FCC ID: 2BBOI-WS1870 equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Huizhou huayusi Technology Co., Ltd (“the applicant”) 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. Signed: Printed name: huanhuan.chen Title: Manager Company Name: Huizhou huayusi Technology Co., Ltd Date: 3/11/2024

Huizhou huayusi Technology Co., Ltd AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Huizhou huayusi Technology Co., Ltd No.02,6th Floor, Technology Center Building, Lixin Road, Zhongkai High-tech Zone, Huizhou city ,Guangdong, China to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have 3/11/2024 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: huanhuan.Chen

Huizhou huayusi Technology Co., Ltd Model difference statement Signed: Printed name: huanhuan.Chen EUT: Wireless Speaker Model No.: WS-1870, WS-309, WS-311, WS-3130 (Only the model name and appearance are different, and the circuit principle and PCB are the same, which does not affect EMC and RF testing.) FCC ID: 2BBOI-WS1870 Address: No.02,6th Floor, Technology Center Building, Lixin Road, Zhongkai High-tech Zone, Huizhou city ,Guangdong, China

Huizhou huayusi Technology Co., Ltd Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada 3/11/2024 K1V 1H2 REQUEST FOR CONFIDENTIALITY - FCC The above information contains trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before PERMANENT LONG-TERM CONFIDENTIALITY: Schematics Block Diagrams FCC ID: 2BBOI-WS1870 Pursuant to Sections 0.457(d)(1)(ii) and 0.459 of the Commission’s Rulesand FCC Guidance document 726920, we hereby request confidential treatment of information accompanying this application as outlined below: Theory of Operation the date of the Grant for this Application. Sincerely, Signed: Printed name: huanhuan.chne Title: Manager Date: 3/11/2024

External photo FCC ID: 2BBOI-WS1870 Page 1/8 M/N:WS-1870 External photo FCC ID: 2BBOI-WS1870 Page 2/8 M/N:WS-1870 External photo FCC ID: 2BBOI-WS1870 Page 3/8 M/N:WS-309 External photo FCC ID: 2BBOI-WS1870 Page 4/8 M/N:WS-309 External photo FCC ID: 2BBOI-WS1870 Page 5/8 M/N:WS-311 External photo FCC ID: 2BBOI-WS1870 Page 6/8 M/N:WS-311 External photo FCC ID: 2BBOI-WS1870 Page 7/8 M/N:WS-3130 External photo FCC ID: 2BBOI-WS1870 Page 8/8 M/N:WS-3130 --END---

Label Location Model No.:WS-1870 FCC ID: 2BBOI‐WS1870

Internal photo FCC ID: 2BBOI-WS1870 Page 1/3 Internal photo FCC ID: 2BBOI-WS1870 Page 2/3 BT Antenna Internal photo FCC ID: 2BBOI-WS1870 Page 3/3 ---END---

RF Exporure FCC ID: 2BBOI-WS1870 Page 1/2 SAR EVALUATION According to KDB447498D01 General RF Exposure Guidance v06 4.3.1. Standalone SAR test exclusion considerations 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 Exclusion Threshold condition, listed below, is satisfied. Limits for SAR evaluation 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 • f(GHz) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation17 • The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion RF Exporure FCC ID: 2BBOI-WS1870 Page 2/2 MEASUREMENT RESULT Test Model: WS-1870 Operation Mode Channel Max Peak Conducted Output Power (dBm) Maximum tune-up Power (mW) Calculated value Exclusion threshold GFSK Lowest (2402MHz) -0.174 0.960 0.30 3.0 Middle (2441MHz) 0.386 1.092 0.34 Highest (2480MHz) 0.846 1.215 0.38 8DPSK Lowest (2402MHz) -0.313 0.930 0.29 Middle (2441MHz) 0.241 1.057 0.33 Highest (2480MHz) 0.863 1.219 0.38 Conclusion: the calculated value ≤3.0, SAR is exempted. Remark: The Max Conducted Peak Output Power data refer to report Report No.: LP23080282C01-10 Prepared by: Approved & Authorized Signer: Jerry Hu/ Engineer Frank Shen/ Manager Issue Date：March 11, 2024 ---END---

Report No. LP23080282C01-10 Dongguan Lepont Testing Service Co.,Ltd. page 1 of 62 TEST REPORT Applicant: Address: Huizhou huayusi Technology Co., Ltd No.02,6th Floor, Technology Center Building, Lixin Road, Zhongkai High-tech Zone, Huizhou city ,Guangdong, China Manufacturer: Address: Huizhou huayusi Technology Co., Ltd No.02,6th Floor, Technology Center Building, Lixin Road, Zhongkai High-tech Zone, Huizhou city ,Guangdong, China Factory: Address: Huizhou Coomaer Technology Co., Ltd 3 Floor B block, Number 5 building,East of first road, Industrial base of tongqiao town,Zhongkai high-tech area,Huizhou city Guangdong China. E.U.T.: Wireless Speaker Model Number: WS-1870, WS-309, WS-311, WS-3130 Test Model： WS-1870 Trade mark: COOMAER FCC ID: 2BBOI-WS1870 Date of Receipt: Feb 27, 2024 Date of Test: Feb 27, 2024- Mar 08, 2024 Test Specification: FCC 47 CFR Part 15, Subpart C Test Result: The equipment under test was found to be compliance with the requirements of the standards applied. Prepared by: Approved & Authorized Signer: Jerry Hu/ Engineer Frank Shen/ Manager Issue Date: March 12, 2024 This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Dongguan Lepont Service Co., Ltd. Report No. LP23080282C01-10 Dongguan Lepont Testing Service Co.,Ltd. page 2 of 62 TABLE OF CONTENTS 1. GENERAL PRODUCT INFORMATION 4 1.1. PRODUCT FUNCTION ..................................................................................................................................................... 4 1.2. EUT TECHNICAL DESCRIPTION ............................................................................................................................ 4 1.3. INDEPENDENT OPERATION MODES ............................................................................................................................... 5 2. TEST STANDARDS AND SITES 6 2.1. DESCRIPTION OF STANDARDS AND RESULTS ................................................................................................................. 6 2.2. LIST OF TEST AND MEASUREMENT INSTRUMENTS ........................................................................................................ 7 2.3. MEASUREMENT UNCERTAINTY .......................................................................................................................... 8 2.4. TEST FACILITY .............................................................................................................................................................. 8 3. SETUP OF EQUIPMENT UNDER TEST 9 3.1. RADIO FREQUENCY TEST SETUP 1 ...................................................................................................................... 9 3.2. RADIO FREQUENCY TEST SETUP 2 ...................................................................................................................... 9 3.3. CONDUCTED EMISSION TEST SETUP .................................................................................................................. 11 3.4. BLOCK DIAGRAM CONFIGURATION OF TEST SYSTEM .................................................................................. 11 3.5. SUPPORT EQUIPMENT ............................................................................................................................................ 12 4. TEST RESULTS AND MEASUREMENT DATA 13 4.1. 20DB BANDWIDTH .................................................................................................................................................. 13 4.2. CARRIER FREQUENCY SEPARATION .................................................................................................................. 19 4.3. NUMBER OF HOPPING FREQUENCIES ................................................................................................................. 25 4.4. AVERAGE TIME OF OCCUPANCY (DWELL TIME) ............................................................................................. 28 4.5. MAXIMUM PEAK CONDUCTED OUTPUT POWER ............................................................................................. 36 4.6. RADIATED SPURIOUS EMISSION .......................................................................................................................... 42 4.7. CONDUCTED EMISSION TEST ............................................................................................................................... 59 4.8. ANTENNA APPLICATION ....................................................................................................................................... 62 Report No. LP23080282C01-10 Dongguan Lepont Testing Service Co.,Ltd. page 3 of 62 Revision History of This Test Report Report Number Description Issued Date LP23080282C01-10 Initial Issue 2024-3-12 Report No. LP23080282C01-10 Dongguan Lepont Testing Service Co.,Ltd. page 4 of 62 1. GENERAL PRODUCT INFORMATION 1.1. PRODUCT FUNCTION Refer to Technical Construction Form and User Manual. 1.2. EUT TECHNICAL DESCRIPTION Product Name: Wireless Speaker Model No.: WS-1870, WS-309, WS-311, WS-3130 Test Model No: WS-1870 Remark: All above models are identical in the same PCB layout, interior structure and electrical circuits. The differences are model name for commercial purpose. Test sample(s) ID: LP23080282C01-05-S010 Sample(s) Status Engineer sample Operation Frequency: 2402MHz-2480MHz Channel numbers: 79 Channel separation: 1MHz Modulation type: GFSK, π/4-DQPSK, 8DPSK Antenna Type: PCB Antenna Antenna gain: -0.58dBi Power supply: DC 5V From Charging；DC 3.7V From Battery Report No. LP23080282C01-10 Dongguan Lepont Testing Service Co.,Ltd. page 5 of 62 1.3. INDEPENDENT OPERATION MODES The EUT has been tested under its typical operating condition. The EUT configuration for testing is installed on RF field strength measurement to meet the Commissions requirement and operating in a manner which intends t…

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Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.26 -0.76 -0.58 -5.25 -2.46 -1.86 MAX. Gain -0.58dB PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length 38.20mm Manufacture Huizhou huayusi Technology Co., Ltd Antenna Photo & Length (mm) Applicant’s name : Huizhou huayusi Technology Co., Ltd Address : No.02,6th Floor, Technology Center Building, Lixin Road, Zhongkai High-tech Zone, Huizhou city ,Guangdong, China Model：WS-1870 Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain (dB) Frequency (MHz) MaxMinAvg 2400-1.26174-30.0801-7.18716 2450-0.765802-36.5604-7.48023 2500-0.585582-22.0315-6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Test photo FCC ID: 2BBOI-WS1870 Page 1/2 Radiated emission Test photo FCC ID: 2BBOI-WS1870 Page 2/2 Conducted Emission at The Mains Terminals Test ---END---