The CURT Electrical Adapter is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket. It easily plugs in your vehicle's electrical socket and usually requires no additional wiring. This CURT Electrical Adapter is designed to adapt a 4-way round vehicle socket to fit a 4-way flat trailer plug. It features quality plastic construction and requires no splicing. All CURT wiring and electrical products come with a one-year limited warranty to give you the assurance you need to tow with confidence.• Adapts a 4-way round vehicle socket to fit 4-way flat trailer plugs• Simple plug-and-play design eliminates the need for cutting or splicing• 4-way flat output connects taillights, brake lights, and turn signals• Slit loom keeps wires contained and well protected Simple plug-and-play design with no splicing 4-way flat output connects taillights, brake lights, & turn signals Slit loom keeps wires contained & well protected | Curt 57225 Electrical Adapter, 4-Way Round to 4-Way Flat