Cover Letter

FCC ID: ZBCWD-241B

Cover Letter(s)

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FCCID_4501129

Justification for WPT RF Exposure Evaluation Consideration Dear Examiner, There’s a WPT device as below we’d like to be authorized per KDB 680106 D01. Company: SHENZHEN DNS INDUSTRIES CO., LTD. Product: WIRELESS CHARGER FCC ID: ZBCWD-241B As addressed in KDB 680106 D01 RF Exposure Wireless Charging App v03section 5, Inductive wireless power transfer applications with supporting field strength results and meeting all the 6 following requirements are not required to submit a KDB inquiry for a PAG for equipment approved using certification to address RF exposure compliance. Here is a briefing about the device. KDB 680106 D01 Section 5 Requirements: Justification 1) Power transfer frequency is less that 1 MHz Yes, 111.54kHz-162.02kHz. 2) Output power from each primary coil is less than or Yes, 10W Max. equal to 15 watts. 3) The transfer system includes only single primary and Yes, includes only single primary secondary coils. This includes charging systems that may and secondary coils. have multiple primary coils and clients that are able to detect and allow coupling only between individual pairs of coils. 4) Client device is placed directly in contact with the Yes transmitter. 5) Mobile exposure conditions only (portable exposure Yes, for desktop application, it’s conditions are not covered by this exclusion). mobile condition. 6) The aggregate H-field strengths at 15 cm surrounding Yes the device and 20 cm above the top surface from all The strengths at 15cm simultaneous transmitting coils are demonstrated to be surrounding the device are less than 50% of the MPE limit. demonstrated to be less than 50% of the MPE limit. Sincerely, Signed By: Jing Song On behalf of SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch under written authorization from Grantee Email: jing.song@sgs.com


Document Created: 2019-10-23 13:44:05
Document Modified: 2019-10-23 13:44:05
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