The Planet Bike Rojo 100 USB rechargeable bike tail light is designed for when you ride The mostduring the daytime to keep you safe and visible by other motorists, cyclists, and pedestrians. The ample light output keeps you visible even on the sunniest of days and works great in any of the four modes at night. The Rojo 100 is designed to keep you safe and visible on every ride, day and night. It's packed with up to 100 lumens of power so you'll be sure to be noticed on your daytime rides and commutes whether you're on the road, bike path or turning the corner downtown. Four precision engineered lighting modes (super flash Turbo, courtesy, steady, and pulse) let you select the perfect optimized optical output. With run times up to 15 hours, a recharge time of only 2. 5 hours on a USB Micro product adapter, The Rojo 100 mounts in any of three positions on your bike with multiple brackets included with the light. The 270 degree of visibility insure that you are not seen only from behind. And the smart charging technology has a built in low battery indicator to let you know when you need to recharge.