Logitech Expansion Microphone for Group (989-000171) - The Logitech Expansion Microphone for Group (989-000171) is designed for large meeting rooms and professional video conferencing environments. It extends the audio coverage of the Logitech GROUP conferencing system, allowing more participants to be heard clearly during meetings. Wideband audio and noise-canceling technology help improve communication quality. Its plug-and-play connectivity makes setup quick and simple. It is an ideal solution for business meetings and large conference spaces.