The wireless camera set up includes 4 or more cameras that can see in color and in total darkness thanks to 20 infrared LED lights.   Hook up the the receiver to a 13" TV/VCR combo or video capture device to view and record the video directly to a laptop or VHS cassette.    This allows you to record EVPs, record video, and track temperature changes all from your laptop.   This kind of set up is also easy to move around and it is not invasive when entering a private home.