90 lumens of powerful flashes alert motorists at night and in broad daylightSteady output for both night and day useUSB rechargeable internal Li-ion battery with run times from 1.5 to 100 hoursCluster mounted array of LEDs work in unison for an extra wide and powerful tail light output, maximizing your visual presence anytime and anywhere24/7 Safety Technology features exclusive night and day modes that enhance your visibility and safety, 24/76 lighting modes: High Flash - High Steady - Group - Zoom - SteadyPulse - Low FlashUnique SteadyPulse mode features an overlapping steady beam with triple pulses for motorists` awareness of your distance and presence in night traffic environmentsPedestrian friendly Zoom mode alerts those around you with a slow and gradual change in brightnessSleek design integrates well with the seat post or seat stayKnow when to charge with its built-in low battery indicatorLight mode memory recalls the last mode usedWater resistant designBlack6RearUSB90UPC/EAN/GTIN: 745025096231