Powerful and efficient single LED blasts 150 lumen flashes (90 lm steady) Engineered to make you stand out in broad daylight and at night Built-in 24/7 Safety Technology gives you a powerful selection of 6 day and night modes (Steady, Zoom, SteadyPulse, Triple Flash, DayLightning Flash, Random Flash) Freely adjust the brightness of Steady mode and the flash tempo of the flashing modes with the simple 2-button interface SteadyPulse mode features a steady beam to help motorists gauge their distance while overlapping pulses keep them alert at night DayLightning mode emits lightning-like flashes to highlight your presence in the brightest of daytime hours Zoom mode signals those around you with a gentle changes in brightness Enhanced Cycling Optics expands your presence with an extra wide and long range beam compared to conventional tail lights Specially treated internal body disperses a radiant glow to keep nearby motorists alert USB rechargeable internal battery lasts up to an impressive 210 hours Low battery indicator alerts you when a charge is needed Light mode memory saves the mode you`re in before the light is turned off Compact, water resistant design only weighs 59 grams Seat post and seat stay mounts included Rack mount compatible Black 6 Rear QR USBUPC/EAN/GTIN: 745025065244