These Animated Hitch Ball Covers go over your trailer hitch ball and plug into your trailer light wiring on your vehicle. They light up and move when your brakes are applied. Duck! Duck Hitch Ball Cover $26.95 Bad Dog Trailer Hitch Ball Cover $26.95 Whoa! Horsey Trailer Hitch Ball Cover $26.95 Flopping Bass Trailer Hitch Ball Cover $26.95 Don't Shoot Deer Trailer Hitch Ball Cover $26.95 Wheelie Hog Trailer Hitch Ball Cover $26.95