Up to 10 times safer than traditional wind-driven deer whistles, the Electronic Deer Alert warns wildlife such as deer, raccoons, rabbits and opossums, skunks, coyotes and squirrels up to 1100 feet away of your approach to help prevent accidents. It always works and wont clog up like wind-driven deterrents. Its easy to install and is hidden from view after installation. Connects directly to your vehicles 12-volt system. Includes installation hardware and wiring with on/off switch. | Hopkins Manufacturing nVISION Trailblazer Electronic Deer Alert