FCC ID: 2AR8X-721-D USB Receiver

FCC ID LABEL:

Label Location

FCC ID: 2AR8X-721-D

Ca. 3mm x 7mm

Cooler Master Technology Inc. Agent Authorization Company: Cooler Master Technology Inc. Address: 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City, 23586 Taiwan Product Name: USB Receiver Model Number(s): 721-D, 712-D, 311-D Product Description: USB Receiver 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. Signature:

Name:

Jane Cai Title:

Cooler Master Peripheral BU LB Company:

Cooler Master Technology Inc. Date: July. 13, 2021

Cooler Master Technology Inc.

Date: July. 13, 2021

Federal Communications Commission

Equipment Authorization Division

7435 Oakland Mills Road

Columbia, MD 21046

USA

Attn: OET Dept.

Subject:

Authorization of Change in Identification

Reference FCC ID: “2AR8X-721-D”

Dear Sir/Madam,

This letter grants authorization for representatives of “Cooler Master Technology Inc. ”

to apply to the FCC for a change in identification as specified under CFR Title 47

2.933(b) of the FCC rules.

This authorization applies to “Cooler Master Technology Inc. ” with “CK721” and FCC

ID “2AR8X-CK721D” .

We are aware that “Cooler Master Technology Inc. ” intends to market the above

referenced product under their own FCC ID.

Sincerely,

Signature

Name: Jane Cai

Title: Cooler Master Peripheral BU LB

Company: Cooler Master Technology Inc.

Cooler Master Technology Inc.

Date: July. 13, 2021

Federal Communications Commission

7435 Oakland Mills Road

Columbia, MD 21046

USA

Reference:

FCC ID: (2AR8X-721-D)

Dear Sir/Madam,

Subject:

Request for §2.933 Change in identification of equipment

(Cooler Master Technology Inc.) requests a Change in Identification for a currently approved

device. This application will establish a new FCC ID for purpose of marketing.

The original Grant for (2AR8X),under FCC ID: (Original ID: : 2AR8X-CK721D)with a Grant

Date of (04/29/2021)will remain in effect.An authorization letter from the original Grantee is

attached.

We attest that the equipment is electrically identical. Only the product name, product model, and

FCC ID are different, The original test results are applicable and continue to be representative of

this device.

The following files are provided as attachments:

 Cover letter giving permission from original Applicant for Change in ID

 External photos showing no physical changes to this device

 New FCC identification label and it’s location.

Thanks and Best

Regards, Name : Jane

Cai Grantee Signature:

Title: Cooler Master Peripheral BU LB

Applicant Company: Cooler Master Technology Inc.

Applicant Address: 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City,

23586 Taiwan

Applicant phone: 013502299605

Applicant Email: Jane_Cai@coolermaster.com.cn

Cooler Master Technology Inc.

Office of Engineering Technology

Federal Communications Commission

7435 Oakland Mills Road

Columbia, MD 21046

USA

Subject; Request for Confidentiality

FCC ID: 2AR8X-721-D

Date: July. 13, 2021

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.

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.

Schematic Diagram

Block Diagram

Parts List

Operational Description

Sincerely,

Signature:

Name: Jane Cai

Title: Cooler Master Peripheral BU LB

Model Difference Declaration

To Whom It May Concern,

We, Cooler Master Technology Inc.(USB Receiver ) Trademark:Cooler Master;

Model Number:721-D, 712-D, 311-D;All model’s the function, software and electric

circuit are the same, only with a product color, appearance and model named

different for commercial purpose.

Test sample model:721-D.

Please contact me if you have any question.

Name: Jane Cai

Date: July. 13, 2021

Title: Cooler Master Peripheral BU LB

Signature of applicant: