The 445HD IP phone is an entry-level model designed to offer the essential everyday features that the modern business environment demands. Full duplex speaker phone and headset connection 4.2" high-res display (480 x 272 pixels), 6 multimedia keys, 4 soft keys, Special LCD (370 x 60 pixel) for displaying contacts, PoE or external AC adapter, Dual GbE and USB headset support.