CURT auxiliary LED indicator lights add extra safety and visibility to your vehicle when towing a cargo carrier, bike rack or other hitch-mounted accessory. Simply stick them on, using the included 3M adhesive backing. These LED cargo carrier lights easily plug into your vehicle's standard 4-flat connector and synchronize with the taillights, brake lights and turn signals. CURT LED indicator lights are constructed to be durable and waterproof to long outlast the elements. Auxiliary indicator lights for increased safety on cargo carriers or bike racks Double row of LEDs in each strip correspond with brake, turn and running lights Industry-standard 4-way flat connector for quick installation 3M adhesive backing for secure, convenient mounting Durable, waterproof construction for lasting weather resistance Limited lifetime warranty (three-year finish, one-year parts)