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., CURT 53201 Auxiliary Automotive LED Light Strips for Hitch Cargo Carrier, Bike Rack, 2-Pack