Fanvil V64 - 12 Line Wi-Fi IP Phone with Gigabit Ports, 21 DSS Keys System: NetworkLinux Main Screen: 3.5-inch 480*320 Color Screen DSS Keys: 21 SIP Lines: 6 Local Phone Book: 1000 Audio Conference: 6-way local conference Wideband codecs: G.722,Opus Narrowband codecs: G.711, G.723.1, G.726, G.729A/B, iLBC USB: USB Type A x 1 ，Connect with USB Headset & USB Bluetooth: Bluetooth 4.2 WiFi: Built-in 2.4GHz & 5GHz PoE: Yes Network: 10/100/1000 Mbps EHS: Yes IPv6: Yes