Sunnytech 4xSolar LED Car Auto Flash Wheel Tire Valve Caps Neon Light Decoration D148 Solar power It is easy to install and easy to maintain. screw on the valve opens when driving at night you can flash automatically, after 2 minutes after stop automatically shut down, not light during the day, the day the sun automatic battery, absolutely waterproof. Durable to use, and with very beautiful lights color, can freely change colors of the lamp, a built-in solar charging panels, automatic fast charge, charging in the sun for more than 3 hours before use. Don't strike the product, so as not to cause irreversible damage. The stake is so sharp that you must be careful when using it. And don't let children play with it.