Hitch Critters Animated Ball Hitch Cover and Brake Light Plastic- Whoa Horsey - The light-up target also provides a functional brake light, for extra visibility and safety. An easy and fun way to lighten the mood of any trip. Fits over any standard two-inch hitch ball and plugs into your standard trailer lights. When you hit the brakes, your Hitch Critter goes into action, Whoa! sign lights up when you hit the brakes. Hitch Critters Animated Ball Hitch Cover And Brake Light Plastic-Whoa Horsey