The Xtreme Tire Valve LED Lights can provide a unique look to your existing vehicle setup. Useable with cars, motorcycles and bicycles, you can attach them to the valves on each tire for a secure fit. Our multicolor lights activate at night when it detects the change in sunlight and the motion of your wheels. Perfect for illuminating your bike while you drive at night to avoid the possibility of accidents occurring. Before you install them, unscrew the LED bulb and remove the protective plastic cover from the batteries. Our item uses 2 LR44 batteries each that can be easily replaced when they run low on power. Have a striking look the next time you go for a bike ride with the Tire Valve LED Lights 4-Pack from Xtreme.