The Polycom VVX411 Gigabit POE IP Phone with backlit 3.5” color display. This phone includes Poly HD voice technology and Poly Acoustic fence technology provide voice clarity and eliminate noise and distractions. Full duplex speakerphone with Acoustic Clarity Technology. This phone also offers 12 line keys support both your lines and autodial or contact keys. 4 soft keys are context sensitive providing you easy-to-find features like transfer, conference and call park while you are on the call.