The Hecto 500XL It features built in cooling fins and cutouts for side visibility. Its single LED design provides up to 500 lumens of output and eight output modes-including a Daytime Flash mode. Runtime is up to 20 hours. Charging is simple with an integrated cable-free USB stick.Securely straps to a variety of handle bar shapes and sizes8 lighting modes allows you to dial in the preferred brightness needed or extend run time depending on the conditions