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. Rechargeable Taillight sits along the rear of the seat post for maximum rear visibility and minimum intrusion high-power Li-Polymer Battery that can be recharged anywhere via a USB cable can be mounted direct to your fi'zi k saddle using the Integrated Clip System or attached to any seatpost using the strap provided