... DVR H.264 compression format 4ch video input,1ch BNC output,1ch VGA output 4ch audio input,1 ch audio output USB backup 4CH, H.264 ... default: 60 min.), Pre-record: 1~30 sec., Post-record: 10~300 sec.Video Detection & AlarmTrigger EventsRecording, PTZ movement, Tour, ... Log informationHard DiskHard Disk1 SATA port, 2.5” SATA HDDSpace OccupationAudio: 28.8MB/H, Video: 56~500MB/HHDD ManagementHard disk ...