Affordable 600 lumen light with plenty of power for commuting or light trail work Cycling Tuned Optics(TM) throws a long range, extra wide beam for optimal road visibility 35mm capable hard handlebar mount with quick release secures the light in tough terrain 7 lighting modes for night and day use with run times up to 100 hours Light mode memory keeps the light in its current mode when turning on and off Engineered with the perfect balance of brightness, ruggedness, and compact style