The usb rechargable cateye volt 100 xcrapid micro light set is a great performance light set featuring 2 mode options opticube lens and a 15 lumen output cateye volt 100 xcrapid micro light set features volt 100xc front light 2 modes constant flash runtime 100lm 1 hr 100lm 5 hrs recharge time 15 hours usb rechargeable opticube lens rapid micro rear light triple led 15 lumen output li ion battery us