The Yealink WHM631UC is a replacement headset for the WH63/WH67 Convertible DECT Wireless Headset. It works seamlessly with major UC platforms like Microsoft Teams and integrates natively with Yealink IP phones. The Yealink WHM631UC is a replacement headset for the WH63/WH67 Convertible DECT Wireless Headset. It works seamlessly with major UC platforms like Microsoft Teams and integrates natively with Yealink IP phones. With Yealink Acoustic Shield Technology, the two Microphones built in WH63 block the background noise automatically but ensure the participant's voice is heard clearly, significantly boosting the communication efficiency With easy on-ear control, you can quickly increase or decrease the volume and answer an incoming or end an ongoing call.