FCC ID: 2A8A3-BT52 Bluetooth Earphone

FCC Compliance Statement:

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. 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 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. FCC Radiation Exposure Statement The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction

Guanzhou Backwin Technology co., Limited Agent Authorization Company: Guanzhou Backwin Technology co., Limited Address: 501, 5th Floor,Jinbao E-commerce No. 3 Jinbao Baiyun Baiyun Guangzhou Product Name: Bluetooth Earphone Model Number(s): BT52, BT50, BT80, BT350, BT800, BT280, BT20, BW20, BW85, BW21, BW10, BW22, BW23, BW25, BW26, BW27, BW70 Product Description:

Bluetooth Earphone We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Date: Aug.11,2022 Signature:

Name:

Title:

Riye YE Sale Manager Company: Guanzhou Backwin Technology co., Limited

Guanzhou Backwin Technology co., Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: August 15, 2022 Subject; Request for Confidentiality FCC ID:

2A8A3-BT52 To Whom It May Concern, Pursuant to the provisions of the Commissions 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 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 OR For 45 days, pursuant to Public Notice DA 04-1705. 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: Riye YE Title: Sale Manager

Guanzhou Backwin Technology co., Limited Family models declaration letter. Date: August 15, 2022 We Guanzhou Backwin Technology co., Limited Of 501, 5th Floor,Jinbao E-commerce No. 3 Jinbao Baiyun Baiyun Guangzhou Product: Bluetooth Earphone Model Name: BT52 Serial Model: BT50, BT80, BT350, BT800, BT280, BT20, BW20, BW85, BW21, BW10, BW22, BW23, BW25, BW26, BW27, BW70 Difference description of series models:

All the model are the same circuit and RF module, except the model names. Thanks Sincerely Signature Name: Riye YE Date: Aug.11,2022 Title: Sale Manager