GoMotion Corelite Waist Light, 100 Lumen CREE LED FULLY ADJUSTABLE - Two-piece design for quick access in and out of a backpack; Backpack sold separately POWERFUL100 LUMEN CREE 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+ hourshours), for different light intensity and run times VERTICALLY ADJUSTABLE- rotary dial on the light changes the light stream from narrow to wide; Light itself can pivot up and down in a range of 100-110 degrees COMPLETE SET- with a flashing red LED light mounted on the back battery pack for high visibility