The Yealink T43U IP desk phone is the perfect business tool to ensure a great call experience. The IP phone features a 3.7" 12-line mono display and can be expanded with an optional module. HD voice technology makes sure you're clearly heard as if you're meeting face to face. Backlit 360 x 160 LCD Optional expansion module available Yealink Optima HD audio quality 2 x Gigabit LAN ports Support PoE (Power over Ethernet, IEEE 802.3af, class 2), phone book for up to 1000 entries Up to 12 SIP accounts EHS support Note: Power supply available separately