Fanvil X3U Middle Level IP Phone; 6 SIP lines with 3 line keys, 3-way conference, SIP hotspot; 1000 local phonebook, caller ID, call hold, call transfer; 320x240 2.8” color display; HD audio on speakerphone and handset; Support EHS wireless headset; Dual Gigabit ports, integrated PoE; Stand with 2 adjustable angles of 45 and 50 degrees; Compatible with major platforms: Asterisk, Broadsoft, 3CX, Metaswitch, Elastix, Avaya etc.