Hitch Critters, Widow Hitch Cover and Brake Light, Black SEMA Award Winning Plugs into your existing standard trailer/tow light plug Comes to life when you hit the brakes 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