Key Features:Simple operation,Tough durable design,Integrated side lighting,Affordable, high powered bike lights,Easy change out, economical alkaline AA batteries,Easy on and off handlebar strap mount with quick release tab,2 Light Levels plus 2 Daylight Flash Modes,Runtime Up to 136h,Super Bright Daylight Flash Mode with Optimal VIZ,Economical Long Run Time / Easily Replaceable Alkaline Batteries.