Cygolite Expilion 350-Lumen USB Rechargeable Headlight Bike light with innovative Cree XPG LED technology for 350 lumens of illuminating power Quick-release internal lithium ion battery stick lets you swap out batteries on the fly Wall charger compatible with 100V to 240V for use worldwide; also supports USB charging One LED bulb with 350 lumens; five-hour charge time; 130-gram weight; run time up to 24 hours Includes limited one-year manufacturer's warranty