This document presents the Radio Frequency (RF) exposure evaluation for the TWS047 wireless device, conducted by Shenzhen Tongzhou Testing Co.,Ltd. The evaluation adheres to the guidelines outlined in section B.4 of 447498 D04 Interim General RF Exposure Guidance v01, focusing on SAR-based thresholds derived from frequency, power, and separation distance.
The report details the methodology used to determine compliance, including the application of the SAR-based exemption formula specified in § 1.1307(b)(3)(i)(B). This formula is applicable for single fixed, mobile, and portable RF sources with available maximum time-averaged power or effective radiated power (ERP) below a defined threshold. The evaluation considers separation distances ranging from 0.5 cm to 40 cm and frequencies between 0.3 GHz and 6 GHz.
The results indicate that the device meets the SAR exemption criteria, as the maximum ERP is below the calculated threshold. Consequently, a formal SAR evaluation is deemed unnecessary. The report provides specific power measurements and calculations to support this conclusion.