Cygolite Turbo 800 Lumen Rechargeable Bicycle Headlight, White, One Size Ultra bright 800 lumens using Cree XM-L LED Compact & lightweight aluminum alloy headlight(90g) with patented jet engine design 6 light modes: High &gt; Low &gt; Boost &gt; Steady Pulse &gt; Day Flash &gt; Walking; Lasts up to 23 hours on a single charge Compact (240 g) , water resistant, & rechargeable with illuminated battery low indicator Includes headlight, Slim Li-Ion battery, smart charger, and Lock-tite handlebar mount