2BH4U-K3Bluetooth speaker

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. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. 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. The device has been evaluated to meet general RF exposure requirement. FCC Warning Statement:

US Agent for Service of Process LETTER OF AT『ESTATION TO: Office of Engineering Technolog y Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: AOCE Corporation Inc. FRN: 0033401381 Contact Name: Johnson.wang Telephone: 1-346 582-5234 Email: [email protected] Applicant: Company name:Shanxi Changkun Electronic Technology co.,ltd FCC ID:2BH4U-P1、2BH4U-K3 FRN: 0035762228 Contact Name:liuyuan Email:[email protected] Address:Floor1-2,Building2,New Materials Industrial Park, Goldsmith Street,Jincheng city,Shanxi Province [Shanxi Changkun Electronic Technology co.,ltd] certifies that, as of the date of this filing of the application with the TC B, [ AOCE Corporation Inc ] is our designated US agent for service of process for the above referenced FCC ID. [Shanxi Changkun Electronic Technology co.,IM] 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 equipment. [ AOCE Corporation Inc ] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and dause §2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause §2.911. Date: 08/03/2024 Applicant's Name:liuvuan 凶fa 饥 1/1

Shanxi Changkun Electronic Technology co.,ltd 8/16/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BH4U-K3 Shanxi Changkun Electronic Technology co.,ltd (“the applicant”) 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. Sincerely, Name: Liu yuan Title: Manager Shanxi Changkun Electronic Technology co.,ltd 8/16/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BH4U-K3 Shanxi Changkun Electronic 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. Sincerely, Name: Liu yuan Title: Manager

Shanxi Changkun Electronic Technology co.,ltd Difference Description We Shanxi Changkun Electronic Technology co.,ltd state: Product name: Bluetooth speaker Model(s): K3, K5, K8, K6, K2, X3, X4, X5, X6, X7, Q7, Q8, Q5, Q6, Q2, Q3, Q9, F1, H-5, H-8 All the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Signature: August 16, 2024 Name: Liu yuan Position: Manager Company Name: Shanxi Changkun Electronic Technology co.,ltd Address: Floor1-2, Building2, New Materials Industrial Park, Goldsmith Street, Jincheng city, Shanxi Province, China Tel: 15513961157 Fax: / Email: [email protected]

Shanxi Changkun Electronic Technology co.,ltd 8/16/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR Product Name: Bluetooth speaker FCC ID: 2BH4U-K3 Model(s): K3 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Schematic Diagram, Block Diagram, Operational Description) required to be submitted with this application be permanently withheld from public review. 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 Please contact me if there is any information you may need. Sincerely, Signature: August 16, 2024 Name Liu yuan Position Manager Company Name Shanxi Changkun Electronic Technology co.,ltd Address Floor1-2, Building2, New Materials Industrial Park, Goldsmith Street, Jincheng city, Shanxi Province, China Tel 15513961157 Fax / Email [email protected]

Shanxi Changkun Electronic Technology co.,ltd 8/16/2024 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen PSI Testing Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: August 16, 2024 Name Liu yuan Position Manager Company Name Shanxi Changkun Electronic Technology co.,ltd Address Floor1-2, Building2, New Materials Industrial Park, Goldsmith Street, Jincheng city, Shanxi Province, China Tel 15513961157 Fax / Email [email protected]

Page 1 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix II external photos FCC ID: 2BH4U-K3 Page 2 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 3 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 4 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------

Label Location FCC ID: 2BH4U-K3 Model No.:K3

Page 1 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix III internal photos FCC ID: 2BH4U-K3 Page 2 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 3 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Page 4 of 4 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China ------End------ BT ANT

FCC ID: 2BH4U-K3 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye W est Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China RF Exposure evaluation According to 447498 D01 General RF Exposure Guidance v06 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 calculation The result is rounded to one decimal place for comparison BT EDR Worse case output power is as below: [2441MHz: 5.62dBm(3.65mW)] Antenna Gain is -0.58dBi (3.65mW /5mm)·[√2.441(GHz)]= 1.14<3.0 for 1-g SAR Then SAR evaluation is not required

Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2450MHz 2500MHz 2400MHz 2450MHz 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 ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Manufacturer's address：2nd Floor, Shop 7, Building 2, Hongya Garden, No. 618 Yingyue Road, Sanzao Town, Jinwan District, Zhuhai City FCC ID:2BH4U-K3 Model:K3 Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(d B) 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.

Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China FCC TEST REPORT FCC ID: 2BH4U-K3 On Behalf of Shanxi Changkun Electronic Technology co.,ltd Bluetooth speaker Model No.: K3, K5, K8, K6, K2, X3, X4, X5, X6, X7, Q7, Q8, Q5, Q6, Q2, Q3, Q9, F1, H-5, H-8 Prepared for : Shanxi Changkun Electronic Technology co.,ltd Address : Floor1-2, Building2, New Materials Industrial Park, Goldsmith Street, Jincheng city, Shanxi Province, China Prepared By : Shenzhen PSI Te s t i n g Co., Ltd. Address : 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Report Number : psi2407122-C01-R02 Date of Receipt : July 23, 2024 Date of Te s t : July 24, 2024-July 31, 2024 Date of Report : July 31, 2024 Version Number : V0 Page 2 of 78 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China TABLE OF CONTENTS Description Page 1. Summary Of Standards And Results............................................................................................ 6 1.1. Description of Standards and Results ..................................................................................... 6 2. General Information........................................................................................................................ 7 2.1. Description of Device (EUT) .................................................................................................... 7 2.2. Accessories of Device (EUT) .................................................................................................. 8 2.3. Tested Supporting System Details .......................................................................................... 8 2.4. Block Diagram of connection between EUT and simulators ................................................... 8 2.5. Te s t Mode Description ............................................................................................................. 8 2.6. Te s t Conditions ........................................................................................................................ 9 2.7. Te s t Facility .............................................................................................................................. 9 2.8. Measurement Uncertainty ....................................................................................................... 9 2.9. Te s t Equipment List ............................................................................................................... 10 3. Maximum Peak Output Power ..................................................................................................... 11 3.1. Limit ....................................................................................................................................... 11 3.2. Test Procedure ...................................................................................................................... 11 3.3. Te s t Setup .............................................................................................................................. 11 3.4. Te s t Result ............................................................................................................................. 11 4. Bandwidth ..................................................................................................................................... 12 4.1. Limit ....................................................................................................................................... 12 4.2. Te s t Procedure ...................................................................................................................... 12 4.3. Te s t Result ............................................................................................................................. 12 5. Carrier Frequency Separation ..................................................................................................... 23 5.1. Limit ....................................................................................................................................... 23 5.2. Te s t Procedure ...................................................................................................................... 23 5.3. Te s t Result ............................................................................................................................. 23 6. Number Of Hopping Channel ...................................................................................................... 25 6.1. Limit ....................................................................................................................................... 25 6.2. Te s t Procedure ...................................................................................................................... 25 6.3. Te s t Result ............................................................................................................................. 25 7. Dwell Time ..................................................................................................................................... 27 7.1. Te s t limit ................................................................................................................................. 27 7.2. Te s t Procedure ...................................................................................................................... 27 7.3. Te s t Result ............................................................................................................................. 27…

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Page 1 of 2 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix I Test Setup Photo FCC ID: 2BH4U-K3 Spurious Radiation Emissions Test (<1G) Spurious Radiation Emissions Test (>1G) Page 2 of 2 Report No.: psi2407122-C01-R02 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Conducted emission Test ------End------