50 lumen tail light with 8 lighting modes engineered for use on roads and commuting Built-in Enhanced Cycling Optics™ expands your visual presence 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 65 hours Built-in 24/7 Safety Technology® gives you a powerful selection of 8 night and day modes (High, Group, Single Flash-Day, Triple Flash-Day,SteadyPulse® -Day, Single Flash-Night, Triple Flash-Night, SteadyPulse® -Night) SteadyPulse® mode features a steady beam to help motorists gauge their distance while overlapping pulses keep them alert at night Flash modes emits lightning-like flashes to highlight your presence in the brightest of daytime hours Adaptive Flash TechnologyTM senses day and night, automatically switching to the optimal flash mode. Low battery indicator alerts you when a charge is needed 30g 
