Cygolite Rover II LED Dual High-Brightness LED Bicycle Light Dual High-Brightness LED headlight as bright as a 25 watt halogen 4 modes: 3 brightness modes including boost mode and flashing mode Low battery indicator Cross-Fire Technology with highly focused lenses expands the field of vision 3.5 hour to 10 hour run time with water bottle battery and overnight charger (USA charger included for use in the USA only)