The Soundstation IP 6000 is an advanced IP conference phone that delivers superior performance for small to midsize rooms. With advanced features, broad SIP interoperability and remarkable voice quality, the Soundstation IP 6000 offers great value for money. Amazing Voice Technology , Featuring Polycom HD Voice technology for high-fidelity calls at up to 14 kHz, the IP 6000 delivers amazingly clear and natural sounding conference calls. Adjustable Microphone Sensitivity 12ft microphone pickup is combined with Automatic Gain Control which adjusts the microphone sensitivity based on where people are sat in the room. Full-duplex technology eliminates dropouts and "No Buzz" technology resists interference from mobile phones and other wireless devices.