Overview: Flashing LED Valve Caps can be used on any kinds of Cars, Motorcycles & Bicycles. Just simply taking off the old valve & replace it on your car. The light will be on when the vehicle runs, off when it stops Bring more color to your car Bring more enjoyment to your drive Safe, Awesome & Eyes-catching indeed It will be amazing when you`re driving or cycling at night Note: don`t remove the transparent insulation sheet inside of the light. otherwise the battery & the metal shell of light may cause short circuit, the battery will soon use out. Specification: Weight Approx:20g Size Approx:6.3 x 1.8 x 1.8