Hidden cameras have never been so easy to use. With other hidden cameras you need to hook them up to a DVD recorder to record what the camera sees. With the hidden cameras below, there is a built in DVR that records to a handy SD card. You literally put the hidden camera where you want it, plug it in, point in the direction you want to film and press record on the included remote control. Doesn't get any easier. You can either hook the camera up to a TV or computer monitor with the included RCA cable or remove the SD card and insert into the SD card reader on your computer or an external SD card reader you can order with your hidden camera.