90 lumens of powerful flashes alert motorists at night and in broad daylight Steady output for both night and day use USB rechargeable internal Li-ion battery with run times from 1.5 to 100 hours 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 Black 6 Rear USB 90