Graphic screen of 3.66 inches. USB port, compatible with USB dongle (optional). PoE power Audio Yealink Optima HD voice. 6 SIP accounts. Agenda of 1000 contacts. 8 programmable keys 2 Ethernet ports GB. Compatible automatic pick-up with EHS port. RJ9 headphone jack. Compatible with EXP20 20-key keyboard extension. Optional power cord (Note: does not include power supply). Dimensions: 265 x 210 x 170.5 mm.