The Avaya 4620 IP Phone features a large graphical display (grayscale, 168 x 132 pixels), 24 programmable call appearance / feature keys and 11 fixed feature keys. It also includes a message waiting indicator, a built-in headset jack and a full-duplex speaker phone for audio conferencing. Avaya 4620 IP Telephone Features 24 Programmable Feature Keys 10/100 BaseT with seperate auto-negotiation for each port 4 application feature buttons along bottom of display Speed Dial, Call Log, Web Browser, Options Large screen graphic display (168 x 132 dots) Full duplex speaker phone with Auto Echo 10 Fixed Feature Keys: Speaker, Mute, Hold, Volume Up, Volume Down, Headset, Conference, Drop, Transfer and Redial Separate headset jack Adjustable stand Intergrated switch for PC connection Infrared port Comes in Charcoal.