Knog Blinder 1 USB Standard Rechargeable Light 1 LED generates 20 lumens for 500+ meters Target Run Time (hrs): 2 constant, 11 eco flash USB Charge Time: 2.5 hours USB designed to be exposed to the elements Inbuilt USB recharge system Waterproof to 3 meters Anodized aluminum face Silicone strap with tool less camber attachment for 22-32.5mm bar/post 20 lumen