"Logitech Expansion Mic for MeetUp. Product colour: Black. Grey""Logitech Expansion Mic for MeetUp provides greater flexibility in huddle room configurations. MeetUp’s built-in beamforming mics are optimised for up to 2.4 metres (8 feet). Adding an Expansion Mic extends that range up to 4.2 metres (14 feet). So whether people are seated at a table. sitting against the wall or standing. Expansion Mic for MeetUp means everyone is heard. In addition. the indicator light shows when the microphone is muted. when a call is active and when Bluetooth® wireless pairing has begun."