Wireless speakerphone. USB-A connection. Three-microphone steerable array. Full duplex audio. Mic pickup range of 7 ft. Up to 20 hours of battery life. Works with computers via USB and smartphones via Bluetooth. Call, answer/end, mute, volume up/don and function buttons. Compatible with zoom. 1.3 x 3.7 x 7.2 in. Sold by each.