... backup USB device, networksupport,USB 2.0,VGA,PTZ,AlarmLive.record,playback,back up & networkBuilt-in web server,client CMS ... VBR effectively)Recording Interval1-120min(default:60min), Pre-record:1-30sec, Post-record:10-300sec.PlaybackPlayback Channel1~16 SimultaneitySearch ModeTime/Date, ... ) 24ch dvr stand alone h 264 embedded dvr Professional CCTV DVR system EDR-9824 High performanc H 264 24 CH ...