Top of the range lighting setvolt 500xc double click to high 4 modes high low hyper constant flash runtime 400lm 1 hr 100lm 8 hrs 500lm 20 hrs 100lm 30 hrs recharge time 7 hours usb rechargeable proprietary opticube lensrapid x2 rear 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 runtim