Features: Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent Waterproofing design Aluminum alloy casing
Characteristic: Multi-function Charge for bike light/headlamp: USB line connect with your computer,click the button,it will bright Use 2x 2032 pack,it can bright(not included)
Package Included: 1x LED Rechargeable Bike Light&Headlamp 1x Rubber O-rings