Aastra M9120 Caller ID Two Line Phone (Charcoal/Refurbished)Key Features: Model #: M9120 2 Line operation Conference key Call display with visual call waiting Speakerphone with mute Headset compatible 7 programmable memory keys 3 Line adjustable backlit display 100 name and number dircetory CLASS message waiting indicator Line in use indicator Compatible with Centrex, PBX and standard telephone service 10 number redial list on hook dialing English French Spanish prompts Choice of four ring tones Adjustable