1100 lumen light with 9 lighting modes engineered for use on mountains, roads, and commuting Built-in Enhanced Cycling Optics™ expands your field of vision with an extra wide and long range beam compared to typical lighting optics Rugged, water resistant design only weighs 150 grams USB rechargeable, internal battery lasts up to 100 hours Built-in 24/7 Safety Technology® gives you a powerful selection of 9 night and day modes (Boost, High, Medium, Low, SteadyPulse®, TripleFlash, DayLightning®, Walking mode) SteadyPulse® mode alerts motorists with attention grabbing pulses while its overlapping steady beam constantly lights your way at night DayLightning® mode emits lightning-like flashes to highlight your presence in the brightest of daytime hours Headlight side light ports further highlight your presence Low battery indicator alerts you when a charge is needed Lockout function prevents accidental light activation 150g