* Functions as 110 lumen bicycle headlight or 30 lumen tail light* 8 headlight and 8 tail light lighting modes engineered for use on 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* One cubic inch, water resistant design only weighs 30 grams* USB rechargeable internal battery lasts up to 90 hours* Built-in 24/7 Safety Technology® gives you a powerful selection of 8 night and day modes (Headlight mode: Boost, High, Medium, Low,SteadyPulse® Low, SteadyPulse® High, DayLightning® Triple Flash, DayLightning® Single Flash / Tail light mode: High, Group, Single Flash-Day,Triple Flash-Day, SteadyPulse® -Day, Single Flash-Night, Triple Flash-Night, SteadyPulse® -Night)* SteadyPulse® mode alerts motorists with attention grabbing pulses while its overlapping steady beam constantly lights your way at night* 30g