The Lumo 1 is Fi???zi:k???s neat, lightweight, aerodynamic red rear light that sits along the rear of the seat post for maximum rear visibility and minimum intrusion for rider. It has a high-power Li-Polymer Battery that can be recharged anywhere via a USB cable. Lumo 1 features four light modes including full-on steady and different flashing patterns, along with a white courtesy light feature, ideal for after-dark stops or repairs. Lumo 1 can be mounted direct to your Fi???zi:k saddle using the Integrated Clip System or attached to any seatpost using the strap provided.