This document is an attestation letter from Yealink concerning their DECT Wireless Headset, model WHD682, with FCC ID T2C-WH68. The letter addresses the Federal Communications Commissions (FCC) regarding the device's capabilities and limitations.
The letter states that the device is designed for marketing purposes and only supports specific technologies: Bluetooth (GFSK, π/4-DQPSK, 8DPSK), Bluetooth Low Energy (BLE) 1M&2M, and DECT (1921.536-1928.448 MHz). Other functions, bands, and modes have been intentionally disabled by the manufacturer through software. This measure ensures that the end user cannot activate these disabled features.
The document is signed by Stone Lu, Vice General Manager, representing Yealink. The letter serves as a formal declaration to the FCC regarding the device's operational parameters and restrictions.