Material: Plastic Size: 5.5*3.5*8cm / 2.15"*1.36"*3.12" Color: Three colors 1. Colorful night riding companion: With wind-driven design, the small windmill rotates with the wind and automatically emits light, which improves the visibility of night riding and ensures your safety. 2. Environmentally friendly and energy-saving black technology: No batteries or additional power supply are required, and the light is driven by natural wind, which is both environmentally friendly and practical, adding a beautiful landscape to your riding. 3. Colorful dynamic light effect: The small windmill is equipped with multi-color LED lights, which presents a gorgeous light when rotating. It is not only beautiful but also effectively attracts the attention of the surroundings and plays a warning role. 4. Simple installation and plug-and-play: Easily fixed on a motorcycle or bicycle, no complicated operation is required, stable, suitable for various outdoor scenes and weather conditions. 5. Creative gift and decoration options: In addition to the riding safety function, this windmill can also be used as a unique gift or garden decoration to bring more fun and color to life. Package includes:1pc Motorcycle wind energy colorful small windmill