The Yealink Headset AdapterEHS35 provides a technical interface between your desk phones and a compatibleYealink wireless headset. The unit is easy to install, simply connect the EHS35to the RJ9 (4P4C) headset. Its plug-and-play effectively allows you remotelycontrol your Yealink T3X phone calls, including answering, rejecting, holding,muting, hanging up, switching between multiple calls, and adjusting the volume. Features: Support Yealink WH62/WH63headset only Compatible with IP Phone: 1) Yealink IP phones (T3X) withremote control feature 2) Yealink(T4X/T5X)/Avaya/Poly/Snom/Grandstream/Fanvil desktop phone without remotecontrol feature Remote control feature: answer,reject, hold, mute, hang up, switch between multiple calls, and adjust thevolume. Plug and play
