Nite Ize STS Bike Light Waterproof, multi-mode, dual LED color bike light featuring a simple touch activated user interface - Swipe-To-Shine Grip-tight attachment easily attaches to the center of nearly any handlebar leaving room on your handlebars for other items Also works as a flashing red tail light when mounted vertically on a bike seat post Light can be removed from base bracket Battery Type: 3 x AAA alkaline replaceable batteries