Planet Bike Blaze 1/2-Watt LED Bicycle Light comes with helmet and QuickCam mounts and two AA batteries * Nichia 1/2-watt LED bulb is several times brighter than a standard LED bulb * Easy-to-use Quick Cam bracket mount and helmet mount adjust or remove without tools * With flashing and steady modes; light runs for up to 100 hours on two AA batteries * Fits 25.4 to 31.8 mm handlebars; backed by a limited lifetime warranty