CCTV DVR H. 264 Network Digital Video Recorder 1.Support 2 USB DVR 2.PTZ, Audio, Network, 3.VGA 4.OEM CCTV DVR ... , support USB, PTZ, network, two-way audio,Alarm, VGA;2. Support mobile phone live preview via GPRS/CDMA/EDGE/3G/WIFI net ... , PPPoE, DHCP , DDNSIE Remote Preview1/4 channels preview simultaneously Mobile phone live viewsupport(Iphone, Android, Symbian, Blackberry, WM, etc.)Long-range ...