Taxi Cab Roof Top Yellow Illuminated Sign Topper Car LED Bulbs 12V Super Bright Light Magnetic Waterproof Sealed Base 10 1/2" x 4 3/8" x 4" with 39.4" Cable Length High quality and super bright LED bulbs. No delay in lighting, much safer, prevent the rear-end collision danger. Easy installation, just attach the light on the roof & plug the cigarette Adapter. Waterproof & sun-proof design. Fit all kind of vehicle with 12V working voltage