Polycom SoundStation IP 7000 (expandable, without power supply)

Network Connectivity: IP (SIP)
Polycom HD Voice™ technology: Y
Microphone pickup range: 6m/20ft
Intelligent microphone mixing: Y
Dynamic noise reduction: Y
Connect to external audio system: Y (Models available with integration to selected digital PBX)
Expansion microphones (wired): Y
Polycom Video integration: Y