FANVIL X303 - 4 SIP LINE IP PHONE WITH COLOR DISPLAY Operating System : Linux Main Screen : 320×240 2.4”Color-screen Backlight : yes Line Keys : 3 DSS Keys : 3 SIP Lines : 4 Audio Conference : 6-way Call Logs : 600 Local Phonebook : 1000 Remote Phonebook : 1000 Action URL / URI : yes HD Audio : yes Wideband Codec :G.722, Opus Narrowband Codec : G.711a/u,G.726,G.723.1, G.729A/B, iLBC WiFi : no Network Rate : 2X10/100Mbps Power Supply PoE : no EHS Headset support : yes Desktop Stand : 45° and 50° Wall Mountable : yes (Brackets not included)