The superior replacement to analogue time-lapse VCRs 4 video inputs Playback at 4 times faster or frame by frame Built-in quad processor On-screen display with real-time clock RTCExternal alarmsensor trigger record feature Record up to 2025 hours of video on a 120GB HDD HDDs sold separately MJPEG video compression format Supports up to 250GB HDD This high quality DVR Digital Video Recorder gives you peace of mind but not at a cost. There is a whole host of features making it a superior replacement for an analogue time-lapse VCR. It supports multiplexers a built-in quad processor & alarm input. Recording frame rate is adjustable from real time 25 or 30fps to the slowest 1fps. The big advantage of a DVR over a time-lapse VCR is the amount of video you can continuously record up to 2025 hours 84 days. Recording times are variable & depend on recording resolution & frame-rate settings per camera installed.BNote B This product is supplied without a hard disk drive. You require an IDE UDMA66 or above HDD. The larger the capacity you install the greater the recording time that will be available. The HDD is mounted into a non-removable in-built caddy. We have a range of specific DVR hard drives designed specifically for 247 video recording as the reduced heat generation enables surveillance systems & PVRs to run cooler & longer. Please note that these are not for use inside PCs does not support data only video. They are supplied with a 5 year warranty B Order Code Description BA99HNAV 160GB ATA HDDA98HNAV 250GB ATA HDD