Planet Bike Blaze 500 XLR Rechargeable Headlight, Black/Grey Cree LED provides high and low power beam along with Super flash flashing mode Run times: 2.5 hrs (500 lm), 4.5 hrs (250 lm) and 25 hrs (Super flash ) Lithium Ion battery charges in 5.5 hours with USB mini cable (included) Smart charging technology with built in low battery indicator Quick-cam bracket mounts, adjusts or removes without tools Weight: 128g Light output 500/250 lumens High/medium/low/flashing run times of 2.5/4.5/25 hours