Grandstream GAC2500, PoE 6-line Enterprise IP Multimedia Conference Phone, Android OS, 6 SIP Accounts and 7-way voice conferencing, Wi-Fi, Bluetooth, 3.5mm audio port, 3 cardioid microphones, HD Voice, 4.3″ capasitive touch screen color LCD (800×480), Dual 100M/1000M Ethernet 802.3at PoE+ Class4