The Lumo 5 is Fi???zi:k???s neat, 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 5 features two light modes: full-on steady and flashing. Lumo 5 can be mounted direct to your Fi???zi:k saddle using the Integrated Clip System or attached to any seatpost using the strap provided.