The Extang e-LIGHT 500 is one of the most versatile automotive lights you can add to your truck. It charges on a 12-volt charger and can be fully charged in about three hourse. Mount it in your bed and use it as a cargo light. If you find yourself in need a flashlight, just detach the e-LIGHT 500 from its cradle to make it fully portable. The light can be mounted anywhere you want using the included automotive tape, magnetic backing, or screws.