Green Creation Wind Light - Wind Powered USB Rechargeable LED Bicycle Safety Light Charge your bike light the eco-friendly way, using wind power! Never worry about running out of batteries as you can always charge while you ride Ideal for teaching kids about wind power and clean energy When needed, you can also connect the light to your computer and charge via USB Comes with a universal bike mount to fit handlebars ranging from 0.9 to 1.5"