The reason these are in the Bargain Bin is because a few of the leds that display the "0" are not lit. This has nothing to do with the DVR surveillance portion of the unit. It is strictly a cosmetic thing with the Nighthawk portion of the CO detector.
Plug the unit into any wall outlet to begin your video surveillance. This is a non-functioning Nighthawk CO Detector. Unit will automatically begin to record after SD card is inserted and power is connected. Recording can be started or stopped via the included IR remote control. Efficient motion activated recording. Playback recorded footage directly to a TV with included cable or remove SD card and playback footage on your computer using the included USB card reader. No computer is really necessary for the usage of this product. One will, however, enhance the usage.
Included 1gig SD card will record up to 30 hours of video at 1FPS or 2 hours of recording in real time (30FPS). Larger cards ( 2Gb, 4Gb, 8Gb) will increase recording capacity accordingly (see chart at left). 8Gb SD card is the max SD card these units can accommodate.
DVR Camera, SD card reader for Windows with USB cable and software, 1 gig SD card, complete easy to understand instruction book, video cable, wireless remote control. Everything you need to plug unit in and start using instantly.