100 lumen red tail light with 6 lighting modes engineered for road cyclistsContinuous array of LEDs work in unison to shine an extra wide and powerful glowUSB rechargeable with up to 100 hours of run timeBuilt-in 24/7 Safety Technology gives you a powerful selection of 6 night and day modes (DayLightning High Flash, High Steady, Group Low Steady, SteadyPulse®, Zoom, Low Flash)Zoom mode signals those around you with a gentle change in brightnessLow battery indicator alerts you when a charge is neededLight mode memory saves the mode you`re in before the light is turned offVersatite flexible mount conveniently attaches to seat posts including aerobarsDesigned, engineered, and assembled in the USABlack6RearSeatpostUSB-C100UPC/EAN/GTIN: 745025061192