Phoenix Audio MT202-EXE Duet Executive USB Plus Digital Telephone Interface Landline Telephone Accessory The compact and discrete design is ideal for use at a personal desk, or in small to mid-sized conference rooms for VoIP applications An integrated mic and speaker with powerful pickup and strong speaker volume provide a large coverage range Advanced echo cancellation and noise suppression offer clear communication that's free of noise and feedback A standard USB connection offers simple plug-and-play connectivity with PC and Mac computers. The unit can draw its power from your computer's USB port, or from the included power supply cable. The power cable has different clips for international use The USB connection also allows you to play back computer media or to record a meeting