Cateye HL-EL135 Front Light has three LEDs and OptiCube lenstechnology for a wider, 150 candlepower beam with excellentvisibility. With two AA batteries, the Cateye HL-EL135 front lightwill run up to 80 hrs on constant mode and up to 320 hrs onflashing mode, making it the perfect everyday commuter safetylight. Featuring our exclusive tool-free FlexTight mounting bracketthat allows you to quickly and easily attach the cateye HL-EL135 tovirtually any bicycle handlebar.