Suitable to be installed in car, motorcycle and bike"s tyre. * The light will flash when tyre wheel is runing, off when stops. * Flash when you are driving at night.Bring more color to your car, Bring more enjoyment to your drive. * Come with a ghost shaped plastic head cap. * Designed with a 0.4cm diameter screw hole and a 0.7cm diameter hole, so that you can install this product on the car or motorcycle tire with the two kinds of hole diameter .