In Spot Reduction: Polycom SoundStation2 Expandable Conference Phone (2200-16200-001)

On-Hook/Off-Hook, conference, mute, volume up/down keys, menu, navigation keys. PCY16200 is expandable with external mics (PCY16155) for large conference rooms, up to 20' microphone pickup range. Dynamic noise reduction. 2.5mm headset jack for connection to other communication devices such as mobile phones (cable included). ...Spot Reduction