The Polycom SoundStation 2 Conference Phone (2201-15100-601) is built off of the legendary Polycom SoundsStation platform. Designed with Polycom's Acoustic Clarity Technology, the SoundStation 2 conference phone provides crisp and clear full duplex technology to an entire room. With dynamic noise reduction capabilities, users can be heard speaking into one of the units 3 microphones at a distance of up to 10 feet away.
The 2201-15100-601 is a non-expandable version of the SoundStation 2. It cannot accept external microphones, but still has the 3 main unit microphones. The 2201-15100-601 is the non-display version of the conference phone. Those looking for a version with a display should purchase the non-expandable 2201-1600-601 conference phone