The rapid x3 front is latest addition to the series utilising two led strips to push out 300 lumens with the continued 180 degree visibility you can be sure youre seen from all angles300 lumen visibilityultra bright strip led technologyli polymer battery technology up to 300 lumen outputcomplex circuitry for safe charge and dischargeusb recharge 403hrs41o ring attachment6 modes high low flashing rapid pulse vibrationruntime from 1 30 hrs depending on modedimensions w 225