It requires a 9V battery, not included, nor is a manual—everything you need to know about its operation is described by a three-step diagram on the packaging card. (By the way, will someone please invent a device to pop open the industrial strength plastic casing that’s fused around everything these days. You need the jaws of life just to open the iBall package.)
Position the magnetic camera on the back of your tow vehicle so that it looks down onto the ball hood thingy on the hitch (that’s a technical term), start backing into position, and keep your eye on the little color tv screen (another technical term, stop me if this is going too fast) that’s plugged into your vehicle’s lighter hole. Watch in awe while you back the ball straight into position.