Kate Zhang

WPC Cover letter

SHENZHEN DNS INDUSTRIES CO., LTD. WD254A WIRELESS CHARGER ZBCWD254A ZBCWD254A wd254a

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Document DEVICE REPORTGetApplicationAttachment.html?id=5280402
SHENZHEN DNS INDUSTRIES CO., LTD
Cover Letter-Wireless Charger Approval
Date: 2021-04-26 Gentlemen: There's a Watch Magnetic Charger that would like to have your authorization as an Inductive wireless power transfer applications approval. The specific product as below, Watch Magnetic Charger, with its designed features and specified description, meets special requirements for KDB 680106 D01 section 5.2 requirements.

Company: Product Name: Model Number: FCC ID:

SHENZHEN DNS INDUSTRIES CO., LTD. Watch Magnetic Charger
WD-254A, WD-254B, 699396 ZBCWD254A

KDB 680106 D01 Section 5.2 Requirements a) Power transfer frequency is less that 1 MHz

Product Technical Specification 326.5kHz

b) Output power from each primary coil is less than 2.5 watts

or equal to 15 watts.

c) The transfer system includes only single primary

and secondary coils. This includes charging systems

that may have multiple primary coils and clients

that are able to detect and allow coupling only

between individual pairs of coils

d) Client device is placed directly in contact with

the transmitter.

e) Mobile exposure conditions only

For inductive applications

where the primary does not

physically attach to the

client, and it is intended for

desktop use, the desktop

guidance in KDB 680106 D01

may be applied

f) The aggregate H-field strengths at 15 cm

Please refer to RF exposure

surrounding the device and 20 cm above the top report

surface from all simultaneous transmitting coils are

demonstrated to be less than 50% of the MPE limit.

Sincerely,

Print Name: Ms Yuki Wu

Title: Certification Engineer

Result Complied Complied Complied
Complied Complied
Complied

Signature:

On behalf of Company: SHENZHEN DNS INDUSTRIES CO., LTD. Telephone: +86-755-83401338 E-mail: [email protected]



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