Aerodynamic rear light with easy two button operation providing up to 160 lumens of output7 lighting modes for day and night use (Steady - Zoom - SteadyPulse® - Bzzz Flash - Triple Flash - DayLightning® Flash - Random Flash)Experience the best battery life ever on the most powerful and slimmest bicycle light series of its kindTwo-button design lets you fine tune the brightness and flash speeds to your cycling needsExpand run times beyond factory default settings by fine tuning the brightness modes and flash speedsSturdy flexible mount built for tough terrain secures the light onto standard and aero seatpostsLight mode memory keeps the light in its current mode when turning on and offEngineered with the perfect balance of brightness, ruggedness, and compact styleCycling Tuned Optics⢠throws a long range, extra wide beamSupercharged 2:30 to 125 hour run timeBlack7RearSeatpostUSB-C160UPC/EAN/GTIN: 745025046144