10 watt, 650 lumen LED headlight 10 watt, 650 lumen LED headlight USB rechargeable 1100 mAh li-ion polymer battery 6 modes including constant, boost, super bright, pulsating, daytime flash, and auto mode Auto mode is enviromentally responsive Daytime flash mode enhances safety in all conditions Includes mounts for handlebars from 18-48mm and a GoPro style mount Run Time: 4.5 hrs (Constant) / 2 hrs (Boost) / 1 hrs (Super Bright) / 20 hrs (Flashing) / 8 hrs (Daytime Flashing) / 2-8 hrs (Auto) Low battery warning and battery level indicator (double click button to check) Tool free installation