4ch hd h.264 dvr -H.264 realtime hd dvr -USB,PTZ,Audio,Network,VGA,HDMI -720P DVR HD realtime recording -CMS/IE management 4 channel HD DVR Features: 1. H.264 Real-time Recording, support USB, PTZ, network, two-way audio, VGA, HDMI;2. Support mobile phone live preview via GPRS/CDMA/EDGE/3G/WIFI net; 3. Dual-core CPU; Steady System Function;4. Playback, video, network transmission, mobile browsing ...