The Logitech GROUP Expansion Microphones are two-wired, plug-and-play microphones designed to extend the Logitech GROUP video conferencing system's voice pickup range to accommodate up to 20 people in larger rooms. They connect directly to the GROUP speakerphone, automatically configuring for use. Each mic features an LED status light for mute and call activity, an 8-foot cable for easy placement, and a built-in mute button that can mute the entire speakerphone system, ensuring clear audio and conversation for everyone in the meeting.