Poly Sync 20+ Speakerphone 

• Three-microphone steerable array
• Full duplex audio for clear conversations
• BT600 Dongle allows for wireless connection to PC
• Mic pickup range: 7ft /2 m
• Up to 20 hours of battery life
• Works w/ computers via USB, and smartphones via Bluetooth
• Call answer/end, mute, volume up/down and function button