Large backlit graphics display (160 x 320) with auto dimming 24 Programmable, multi-function, self-labeling keys, provided in 3 pages of 8 keys each 12 fixed function keys: Hold, Settings, Message, Speaker, Mute, Transfer / Conference, Redial, Cancel, Volume/Ringing/Contrast Up & Down, Previous Page, Next Page Powered by 802.3af PoE or OPTIONAL 48VDC local power supply (power supply is only needed if PoE is not available on your network) Next-generation desktop provides built-in HL applications and wideband audioThe Mitel MiVoice 5330e IP Phone is a full-feature enterprise class telephone that provides use