PORTLAND DESIGN WORKS RADBOT TAILLIGHTTOTALLY RADWhether you're riding your bike during the day or at night, then you're going to want a rear light on your bike to increase your visibility. The Portland Design Works Radbot Taillight is equipped with a blazing 1.0 watt LED and a large precision reflector that provides visibility to your backside. It is powered by 2 AAA batteries and features three modes: zZz pop, Cornea Blitz, and Rock Steady for up to 30 hours run time. The light also features an on/off switch that must be depressed for 1.5 seconds to turn the light on and off. This helps prevent the light from being turned on by accident if it's in your pocket or bag.FeaturesThree modes for up to 30 hours of run timeLarge precision reflector increases visibility furtherWeatherproof exterior for all season ridingFlash ModesModezZz PopCornea BlitzRock SteadyLumens---Run Time (h:min)--- SpecificationsNumber of LEDs1Battery TypeAAA, InternalWeight62gWater ResistantYesLow Power IndicatorYesMounting TypeStayputnik QR, Rack MountsBattery MountingInternal