Mitel 5312 IP Phone (50005847) Two-line by 20-character white, backlit, graphics display with contrast control and auto-dimming Twelve programmable multi-function keys with dual-color LED indicators (for speed dialing, line appearances, feature access) Eight function keys: hold, menu, message, speaker, mute, transfer/conference, redial, cancel Handsfree speakerphone operation (full duplex) Browser-based desktop user tool programming for easy access to telephone system features