FCC ID: 2A4KO-ESSONIO Bluetooth headphones

Bone conduction headphones FCC Requirement changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the 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. 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.

Hongshangen Technology Co., Ltd. (CHINA limited company (Itd.) ) Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Date: 2022-2-18 SUBJECT: FCC Application for (FCC ID:2A4KO-ESSONIO) To Whom It May Concern:

We, the undersigned, hereby authorize Yoyo Zhou_ in Shenzhen Huaxia Testing Technology Co.,Ltd at 1F., Block A of Tongsheng Technology Building, Huahui Road, Dalang Street, Longhua District, Shenzhen, China on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Shenzhen Huaxia Testing Technology Co., Ltd on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Sincerely,

(Must be signed by the person that is listed on the FCC Website) Signature: Junying hin Contact name: junying Liu Company name: Hongshangen Technology Co., Ltd. (CHINA limited company (|td.) ) Address: F Zone. Unit 204, No 476, Airport North Road, Xiamen Area, (fujian) Free Trade Zone, Fujian, CHINA 361009

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(Itd.) ) Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2A4KO-

ESSONIO Pursuant to Sections 0.457 and 0.459 of the Commissions Rules, we hereby request confidential treatment of information accompanying this application as outlined below:

Exhibit Type File Name 1. Block Diagram, 1. 2A4KO-ESSONIO -Block diagram 2. Schematics, 2. 2A4KO-ESSONIO -SCH 3. Operational Description 3 2A4KO-ESSONIO -Operational description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commissions public notice, we also request temporary confidential treatment of information accompanying this application as outlined below for an initial period of xxxx (ie- 45, 90 or 180) days:

Exhibit Type File Name N/A N/A Signature: )unying du Contact name: junying Liu Company name: Hongshangen Technology Co., Ltd. (CHINA limited company (Itd.) ) Address: F Zone, Unit 204, No. 476, Airport North Road, Xiamen Area, (fujian) Free Trade Zone, Fujian, CHINA 361009

Hongshangen Technology Co., Ltd. (CHINA limited company (ltd.) ) Model Confirmation Letter We, (Hongshangen Technology Co., Ltd. (CHINA limited company (ltd.) )) certify the product: Bone conduction headphones Model No.: K7, K8, K9, K11, B1, B2, B20, H15PRO, PRO9, Q1, Q2, Q3, X18, X18PRO, X19, X19PRO, Y8, Y9, Y10, Y11, ME100, V16, T880, BT06C, BT06C+, JP2S, DYY-08 Their electrical circuit design, identical,Only the model is different. layout, components used and internal wiring are Signiture:

Grantee Contact: junying Liu Company Name: Hongshangen Technology Co., Ltd. (CHINA limited company (ltd.) ) Date:2022-2-18