50 lumen flash output and 30 lumen of steady output. 1:30-100 hr run time. Micro USB rechargeable. Highly visible radiant light from omni-directional LEDs. Sleek low profile design 6 lighting modes: Steady, High Flash, SteadyPulse, Zoom, Low Flash, Group Mode. Alert motorists with pulses while constant beam helps gauge their distance with SteadyPulse mode Pedestrian friendly Zoom mode signals those around you with a gentle change in brightness.