The light will be off when the vehicle stops and on when it runs jarless Flashes when you're driving at night. Brings more colors to your tire. Brings more enjoyment to your drive. Multifunctional screws for bicycles and motorbike. It consists of light control circuit, induced circuit, luminescence circuit. Independent circuit design, no need to change or connect with the circuitof a car, directly install it to the tyre valve.