Premium rear light that has all the versatility of the different rear light technologies merged with a hefty run time From short urban commutes, to time trials and the peloton all the way to your transcontinental adventure, this light has you covered ReAKT technology. Rear lighting that flares up automatically under braking. It can also intelligently adapt to the surrounding ambient light conditions to maintain maximum contrast and visibility, for example brightening for street lit areas and moving into sunlight from shade 648 hours of run time