The Yealink WHM631UC is a high-quality replacement headset unit designed specifically for the Yealink WH63 and WH67 Convertible DECT Wireless Headsets. This lightweight, 19-gram earpiece features Yealink Acoustic Shield Technology, utilizing dual microphones (an ECM and MEMS microphone) to effectively suppress background noise, ensuring crystal-clear voice communication even in noisy environments.

Equipped with a 13.6 mm speaker, the headset supports an audio bandwidth from approximately 20 Hz to 10 kHz for the speaker, and 100 Hz to 8 kHz for the microphones. Users benefit from convenient on-ear controls for answering and ending calls, adjusting volume, and muting the microphone to streamline communication.

The WHM631UC supports USB charging via the included cable, fully charging in about 2.5 to 3 hours (5V/1.2A). It offers a reliable talk time of 6 to 8 hours and standby time around 54 hours. Designed as a seamless replacement part, it retains full compatibility with the Yealink DECT system and wireless range up to 100 meters line-of-sight.

Key features include:

• Dual-microphone Acoustic Shield Technology for superior noise cancellation


• Lightweight and comfortable design with compact 13.6 mm speakers


• On-ear call management controls including call answer/end, volume, and mute


• USB charging support with fast recharge times


• Extended battery life with up to 8 hours talk time and 54 hours standby


• Specifically made to replace WH63/WH67 headset units without requiring other system changes