The Anzo Dual Four-Flat Adapter is the most universal choice in electrical trailer plugs. Connects your vehicle's electrical system to lighting system plugs found on most small boat, utility, snowmobile and small camper trailers. Simply plug it in and it gives you automatic control of right- and left-turn lights, brake lights, tail and marker lights. Rigorously tested to resist rain and weather. Compliant with D.O.T., S.A.E., local, state and international standards.