Yealink Ultra-elegant Gigabit IP Phone, 4.3″” 480 x 272-pixel color display with backlight, Opus codec support USB 2.0, Up to 16 SIP accounts, Dual-port Gigabit Ethernet, PoE support, Paperless label design, Headset, EHS support, Supports expansion modules, Stand with 2 adjustable angles, without PSU.