KNOG Blinder 1 Twinpack Light Front LED generates 20 lumens for 500+ meters; Rear LED generates 11 lumens for 500+ meters of visibility Target Run Time (hrs): 2 constant, 11 eco flash USB Charge Time: 2.5 hours USB designed to be exposed to the elements USB rechargeable, fully waterproof and wicked bright - 20 lumens front, 11 lumens rear USB rechargeable, fully waterproof and wicked bright - 20 lumens front, 11 lumens rear USB rechargeable, fully waterproof and wicked bright - 20 lumens front, 11 lumens rear USB rechargeable, fully waterproof and wicked bright - 20 lumens front, 11 lumens rear USB rechargeable, fully waterproof and wicked bright - 20 lumens front, 11 lumens rear