The AMPP100 & ViZ100 offer a powerful 100 Lumen LED with OptiCube™ lens technology for a wide beam, perfect for nighttime and group rides. The lights are USB rechargeable, running up to 35 hours and charging in just 2.5 hours, with four light modes (Constant, Flashing, Group Ride, Daytime Hyperflash). The longer rear beam projection greatly increases visibility, so you're sure to be seen at a distance.