The Cateye Rapid Mini is a rear light designed for minimalists. Weighing in at just 22g the Rapid Mini fits neatly to your seat-tube making it ideal for weight & aero conscious roadies. The Cateye Rapid Mini comes with 4 modes & is USB (Universal Serial Bus) rechargeable. 3 x red SMD LEDs 25 Lumen output USB (Universal Serial Bus) Li-Ion rechargeable battery Mounting bracket 21.5 32mm Light mode memory Battery indicator Battery Auto Save, converts to flashing mode so youre never left in the dark Recharge time: 2 hrs Mode: Runtime Constant: 3 hrs Rapid: 5 hrs Pulse: 20 hrs Flashing: 30 hrs