... compression, support dual stream network transmission.Support Wifi and IR extend to 5~25MSupport CIF ... DDNS,NTP,UPNP,EMAIL,Alarm Server,ARSP,Wifi,3G.Support backup & upgrade with USB flash ... disk.Perfect support 3G Mobilephone Surveillance with Symbian, Windows CE, iPhone ... DNS,DDNS,NTP,UPNP,EMAIL,Alarm Server,ARSP,Wifi,3G IE Remote PreviewIE(need Manual Installation), NetView, ...