With double the output of the rapid x the rapid x2 somehow manages to keep the slim form now synonymous with the x range by beefing up the led and battery cateye have squeezed a massive 100 lumen output from this diminutive light cob led technology li polymer battery up to 100 lumen output 360 degree visibility complex circuitry allows safe charge and discharge usb recharge 3 hrs o ring attachment battery auto save auto flash 5 modes constant flashing rapid pulse vi