4 programmable/line feature keys High-resolution 396 x 1262 pixel-display Supports a power-save option that reduces power consumption during off-hours Gigabit integrated switch for colocated PC Power over Ethernet Class 2 Headset port Optional wideband handset Electronic Hookswitch headset control Optional key expansion module (KEM) Compatible with the Cisco Unified IP Phone Power Injector and Cisco Aironet Power Injector