... security surveillance 4ch DVR 1.H.264 DVR compression 2.4 channel D1 playback 3.VGA+Alarm+PTZ+network 4.USB Home-type video security surveillance ... , recording, playback, net transmission, backup, wireless monitor and DVR operation simultaneously5.Supports Remote control, Mouse operation6. ... Management11.Powerful network software: web server,multi-DVR client for remote live viewing and other remote ...