Hitch Critters Duck Animated Ball Hitch Cover and Brake Light Comes to life when you hit the brakes Plugs into your existing standard trailer/tow light plug Funniest hitch covers and brake lights ever invented Funniest hitch covers and brake lights ever invented Plug into your existing trailer light plug and they come to life when you hit the brakes Simply snap over your 1 and 7/8 inch or 2 inch ball hitch