Built-in advanced motion detection feature Monitors 4 channels of video Use with any TV & security monitor Motion detection audio monitoring intelligent searches Compact light-weight & simplistic design Built in quad processor This DVR Digital Video Recorder has a whole host of features making it an ideal replacement for a time-lapse VCR. It has on-screen display with RTC Real Time Clock supports multiplexers a built-in quad processor channel labels alarm input & video loss alert in fact the list of feature goes on & on. The big advantages of a DVR over a time-lapse VCR are the amount of video you can record up to 720 hours if using a 120GB HDD of high quality video. Features of the unit include 4 camera video loops & 2 video outputs for security monitors & software & hardware based motion detection for optional 4 PIR & 1 Alarm contact on the rear.