50 lumen tail light with 8 lighting modes engineered for use on roads and commutingBuilt-in Enhanced Cycling Optics⢠expands your visual presence with an extra wide and long range beam compared to typical lighting opticsOne cubic inch, water resistant design only weighs 30 gramsUSB rechargeable internal battery lasts up to 65 hoursBuilt-in 24/7 Safety Technology® gives you a powerful selection of 8 night and day modesSteadyPulse® mode features a steady beam to help motorists gauge their distance while overlapping pulses keep them alert at nightFlash modes emits lightning-like flashes to highlight your presence in the brightest of daytime hoursAdaptive Flash Technology senses day and night, automatically switching to the optimal flash modeLow battery indicator alerts you when a charge is neededLight mode memory saves the mode you`re in before the light is turned offFlexible mount easily attaches to seat posts including aero stylesDesigned, engineered, and assembled in the USA since our founding in 1991Black8RearUSB50UPC/EAN/GTIN: 745025075106