The cateye rapid x usb rechargeable front light the rapid x front utilises two led strips to push out 300 lumens with the continued 180 degree visibility you can be sure yoursquore seen from all angles cateye rapid x usb rechargeable front light ultra bright strip led technology li polymer battery technology up to 80 lumen output complex circuitry for safe charge and discharge usb recharge 2hrs o ring attachment 6 modes high low flashing rapid pulse vibration