Exposure Lights Blaze Mk3 Rechargeable Taillight - Blaze MK3 With ReAKT And Peloton is a premium rear light that has all the versatility of the different rear light technologies merged with a hefty run time.Ambient Kinetic Technology (ReAKT) enables the light to automatically flare under braking and when entering areas of higher ambient light to create a contrast in brightness. Peloton mode dims rear light when a following rider's front light is detectedOptimized Mode Selector provides multiple programs for choice of run times and modes so you can find the right one for your rideDayBright flash pattern and side illumination for 360 degvisibility makes this an attractive package.