Enjoy the fun of night riding with Serfas' TSL-150 True Light Headlight. It lights your way with 150 lumens of brightness without an external cord or battery pack. Recharging is simple and convenient too. Just plug it into your computer's USB port or use the included wall charger. This great light has steady and flash modes plus high, medium and low beams, and it includes both helmet and handlebar quick-release mounts. You also get a replaceable Lithium-ion battery.