Cygolite 2014 Streak 280 Lumen USB Rechargeable Bicycle Headlight Super bright 3 watt - 280 lumens Cree X Lamp LED, Custom TIR optics for cycling, side illumination ports for added visibility Steady Pulse mode: alerts motorists with pulses while lighting the path at night, Daylighting mode: lightning-like flashes demand attention in the day 5 light modes: Medium &get; High &get; Low &get; Steady Pulse &get; Daylighting ; Lasts up to 10 hours on a single charge Compact (90 g), water resistant, and USB rechargeable with internal Li-ion battery that saves cost of replacement batteries Includes headlight, USB charging cable and Lock-title handlebar mount