Instructions: Use the wind power generated when driving. When the speed is up to 30 km/h, the LED lights will light up, which makes your driving safe. Functions: 8 high brightness LED lights, energy-saving, long lifespan; Accessories: Equipped with strong double-sided adhesive tapes. Easy installation without wiring. Features: Integrated design, small size, compact structure. Waterproof design:No need to worry about water problems, even if the entire circuit board is soaked in water. The LED lights will come out with the fan rotating. Note: Don't install this product on any rotational part of the vehicle.