... CCC 2. Entry Level DVR300 Series 4ch Network DVR/4 ch DVR 3.H.264 video compression Entry Level DVR400 Series ... 4ch Network DVR/4 ch DVR H.264 video compression, G.711 audio compression;1080P ... Mouse, NetworkRecording PriorityManual>Alarm>MD>RegularRecording Size1-120min(default:60min), Pre-record(1-30sec)Trigger EventsRecording, PTZ Movement, Tour, Alarm, ...