19" TFT;Support remote access through mobile phone with Iphone/ Blackberry/ Symbian/ Windows mobile/ Android OS on 3G; support Email Alarm function.; Recording bit/frame adjustable; Preview, record, playback and internet access working at the same time; Auto protect and auto resume; support DDNS; support 1 hard disks above 2000GB; With RS485 / RS422, RJ45 & USB interface, support PTZ control, IE & Client view, Support network remote, USB backup,USB upgrade; with remote control, support Mouse.