... 4.USB Backup,SATA port 5.IN:16Ch Video 8-Channel Standalone DVR AST-DVR0804LBH.264 Algorthm, Pentaplex, Support Internal CD / DVD ... bios version, on-line user etc.VideoVideo Input4/8/16 channel, BNC, 1.0Vp-p, 75?, looping(optional)Video Output2 ... , PTZ movement, tour, alarm, e-mail & ftp uploadAlarm Input4/16/16 channel, programmable, ground, manual open/closedTrigger recording, PTZ movement, tour, ...