DESC: With the Polycom SoundPoint Pro desktop IP Phone, smaller rooms and individual offices get the same full-duplex clarity as the boardroom, with a front microphone optimized for hands-free, one-to-one phone conversation. Press the rear microphone key on the Professional model for group conferencing with 3600 coverage. You can have up to a 4-way unassisted conference right from your desktop. Use it as a handset, in speaker mode or attach a headset. Change modes with a touch of a key or by lifting the handset.