From grueling 24 hour races to night rides on desolate country roads, the Lezyne Power Drive 900XL Head Light provides brilliant illumination on pitch dark evenings with its 900 lumen output. High output LEDs prevent flickering or fading throughout its battery cycle, thanks to Lezyne's Constant Lumens system. The Enhanced MOR lens features side visibility slits for a wider beam, which is vital when you're rounding corners and banked turns at night. Overdrive Race Mode toggles between Overdrive and Economy beams for an optimal balance between bright light and long lasting battery life. Mode Memory functionality takes the guess work out of finding your favorite lighting by returning to the previous mode after you've turned it off. Plus, its advanced Li ion battery lasts up to 7. 5 hours in the Economy setting or 14 hours when you're using it in Flash mode. It comes with a rubberized strap for easy mounting on your handlebars, a rubber adapter for use with round bars, and a USB cable for speedy charging.