Light bars notify pedestrians and oncoming traffic of Rural Mail Carrier presence. They easily mount onto vehicles securely with magnets. Be safe on the road with Beacon Mini-Light Bar, excellent for mounting on LLVS and other postal vehicles, as well as forklifts, mules, and other powered facility equipment. Each light features a 10 ft. cord with plug and dual rotating 12 volt halogen light bulbs that omit and amber light. Ships USPS.