Yealink EHS35 - Wireless Headset Adapter Graphics Tablets It includes a comprehensive RS-232C

It includes a comprehensive RS-232C and LAN command set

Built-in 16C450/550 compatible UART

Logitech's exclusive SilentTouch technology reduces 90% Click noise reduced by over 90% compared to Logitech M170

Manufacturer Part Number: LH85BECHLGFXZC

Using this USB-C to HDMI video splitter

Yealink EHS35 - Wireless Headset Adapter Graphics Tablets It includes a comprehensive RS-232CYealink EHS35 Wireless Headset Adapter The new and advanced Yealink Headset Adapter EHS35 provides a technical interface between your desk phones and a compatible Yealink wireless headset. The unit is easy to install, simply connect the EHS35 to the RJ9 (4P4C) headset. Its plug and play effectively allows you remotely control your Yealink T3X phone calls, including answering, rejecting, holding, muting, hanging up, switching between multiple calls,