Material: Durable stainless steel and plastic - The LED type lamp (the LED wheel light) use onto tire of car / motorcycle / bicycle directly install onto the air valve - Perfect addition to your car bike or bicycle and brings your car more color and enjoyment - Motion activated light automatically when the vehicle moves - Super bright energy saving and long lifespan LED - Easy installment simply screw it into the tire valve - Increases night time and bad weather visibility for safety - Automatically turn off after the wheels stopped - Powered by 3 x AG10 batteries (included)