This powerful rechargeable headlight is like customization, moreover you can mount this light onto wherever you want or like only by the convenient adjustable-elastic-strap.The rechargeable batteries with red LEDs is not only batteries but also can used to be the safety light or tail light. Most important thing is that the material of QL-259 will never destroy the surface of your bike, because Q-LITE is always by your side to design cycling light.