3 line display with backlighting, 24 freely programmable function keys, High-quality wideband voice transmission, Plantronics EHS-compatible, 2x 100Mb Ethernet ports, PoEAvailable in black and white.The KX-NT500 series of IP terminals offers ‘best in class’ Wideband High Definition Audio, meaning fewer repeated conversations and misheard calls.A 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.