50 lumens of powerful flashes alert motorists at night and in broad daylight 30 lumens of steady output for both night and day use 1:30 ~ 100 hour run time USB rechargeable internal Li-ion battery Cluster mounted array of LEDs work in unison for an extra wide and powerful tail light output, maximizing your visual presence anytime and anywhere 24/7 Safety Technology features exclusive night and day modes that enhance your visibility and safety, 24/7 6 lighting modes: High Flash - High Steady - Group - Zoom - SteadyPulse - Low Flash Unique SteadyPulse mode features an overlapping steady beam with triple pulses for motorists` awareness of your distance and presence in night traffic environments Pedestrian friendly Zoom mode alerts those around you with a slow and gradual change in brightness Sleek design integrates well with the seat post or seat stay Know when to charge with its built-in low battery indicator Light mode memory recalls the last mode used Water resistant design Lightweight 29 g Black 6 Rear USB 50UPC/EAN/GTIN: 745025056082