polycom sound station 2 conference audio phone

High Definition ?HD? AudioThe KX-NT500 series of IP terminals offers ?best in class? Wideband High Definition Audio, meaning fewer repeated conversations and misheard calls. LCD DisplayLarge, clear LCD display with intuitive User Interface offer fast access to phonebooks and features. Electric Hook SwitchA built in Electronic Hook Switch (Plantronics compliant) port allows the KX-NT500 series IP Terminals to have access to the Plantronics range of DECT enabled headsets. ECO Friendly Low power consumption, combined with an advanced ECO standby mode means lower energy costs.