LEDHOLYT 8w Warning Caution Emergency Light Strobe Work Flashing Car Roof Lamp Magnetic Base Amber(Yellow) Light Color DC 12V One mode of flashing light, it will flash automatically after connecting to the power. High bright,up to 50000 hrs life expectancy.1 year warranty.Mini size,dimension:(D)3.5x(H)5in. Just put the cigarette connector into the car cigarette lighter,push the switch button to start to work. Easy to install,just put it on the car,there are strong magnets at the base so it can stick to the car roof tightly. ABS material,waterproof.Aluminum alloy base,high efficiency of heat radiation design.Ideal for school car,projector,traffic,ect.