HD 720p dvr digital video recorder -H.264 realtime HD 720P DVR -USB,PTZ,Audio,Network,VGA -720p realtime record -2 HDD, 4TB 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 ...