MITEL MIT-5324-REF VOIP BUSINESS TELEPHONE (Certified Refurbished) FULLY REFURBISHED; INCLUDES 1 YEAR WARRANTY 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 Browser-based desktop user tool programming for easy access to telephone system features; Handsfree speakerphone operation (full duplex) Speed calling Call forward Call hold (place/retrieve) Call transfer Two-line by 20-character white, backlit, graphics display with contrast control and auto-dimming