Poly SoundStation 2 Expandable Conference PhoneThe Polycom SoundStation2 Expandable Conference Phone provides exceptional sound quality in small and medium sized conferences rooms. This full duplex speakerphone allows for productive simultaneous two way conversations and features three cardioid microphones with a 10' pickup range. Adjustable volume with dynamic noise reduction delivers clear sound. The phone's caller ID, mute, 25 entry phonebook and selectable ring tones help you manage calls