Description: Functionality: This Aircraft LED Wind Energy Powered Bike Night Lights operates without battery; it uses wind power to rotate and light up when the vehicle is in motion, making it eco friendly choiceMaterial: This car wind light is made of high performance PP. The light can illuminate the road ahead and contribute to driving safeWind Power Generation: LED wind power car lights use wind power generation, blade turbocharging, and use to impact the rotation of the impeller to generate electricity, which is more energy saving and environmentally friendly, and extends its service lifeEasy to Install: The wind drive running light is simple and convenient to install and operate. It is easy to install and can be adjusted to the desired position according to your own ideasUsage Tips:Daytime running lights are suitable for various models, cars, bicycles, electric vehicles, etc. At the same time, it can not only decorate your car, but also a must have car accessory for rainy days, foggy days, snowy days, and mountain road Specification: Material: PP Size Chart: 8cm/3.15inch Package Includes: 1XWind Power Led Light Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.