Logitech Expansion Microphone for GROUP System, Black, 2/Set (989-000171)

Plug-and-Play Technology
All you do is plug both microphones into the GROUP system camera on your tabletop to activate the microphones. There is no software to download or complicated settings to adjust. Just put the microphones on your existing table alongside your videoconferencing camera and you have instant expansion.

Increase Audio Range
Increase the audio range from 20 feet to 28 feet surrounding the GROUP system. This allows you to include more people in the meeting, and you can even expand your set-up to two 12-foot tables if you wish. At 28 feet, you can move your conference to a medium-sized room that allows for more chairs, more table space and more comfort so people don't have to strain to be heard.

Mute Functions and Omnidirectional Presence
Each microphone has a mute button for privacy, and a mute indicator light shows that your group has the freedom to talk among themselves without the other side listening in. Otherwise, the omnidirectional microphones readily pick up sound from all sides of the room so every voice is heard clearly and distinctly.