LOGITECH GROUP EXPANSION MICROPHONE PAIR, OMNIDIRECTIONAL, DETACHABLE, CABLE LENGTH 8.50M

Optional expansion microphones Expand the conversation range from 6 m/20 ft to 8.5 m/28 ft, so even those far from the speakerphone can be heard clearly. The microphones, sold in pairs, are automatically recognized and configured as soon as they are connected to the speakerphone.