GoMotion Trail Runner Reflective LightVest, 3 Watt Luxeon LED Lightweight cool-mesh vest made for comfort and function; Two rear zipper pockets and two front zipper pockets for easy accessible item storage High-output 3-watt LED light powered by 3 AA Energizer batteries located in the external battery pack; Batteries included Customizable light modes, High/Medium/Low (20/24/50+ hours), for different light intensity and run times Vertically adjustable rotary dial on front light changes the light stream from narrow to wide; Light itself can pivot up and down in a range of 100-110 degrees Complete with a flashing red LED light built into the back batter box for high visibility