With 550 lumens, Serfas’ TSL-550 headlight commands attention. Five modes illuminate your path, and the long-lasting, rechargeable Lithium-on battery is conveniently integrated into the light body. Plus, the battery is user-replaceable. With the included USB cable and wall charger adapter, you can recharge it nearly anywhere. It also includes quick-release handlebar and helmet mounts. Interchangeable lens let you adjust between standard or wide beam patterns.