The Yealink T53 IP deskphone is an easy-to-use, high-quality business phone delivering optimum desktop efficiency and productivity. Backlit monochrome 360 x 160-pixel LCD 4 x context sensitive softkeys, 6 x navigation keys Yealink Optima HD audio quality, PoE support (Power over Ethernet, IEEE 802.3af, Class 2), Up to 12 VoIP accounts. Note: Power supply available separately