LEDHOLYT 3w LED Warning Emergency Security Strobe Flash Car Light Magnet Base Amber(Yellow) Light Color DC 12v Consistant flashing light,yellow light color,DC 12v,high intnsity LEDs. High bright,up to 50000 hrs life expectancy.Dimension:5.4x3.6in. Just put the cigarette connector into the car cigarette lighter,it will flash automatically. Easy to install,just put it on the car,there is strong magnet at the base so it can stick to the car surface tightly. Suitble for cars with a 12V DC cigarette lighter adaptor.1 year warranty.