STREAMLIGHT JR.® flashlight powered by two AA alkaline batteries (included) or two AA lithium batteries. 1 watt C4® LED, 50000-hr LED. Up to 3800 candela (peak beam intensity) and 85 lumens measured system output. Runtime to the 10% output level: AA Alkaline Batteries - 4 hours, AA (L91) lithium batteries - 5.25 hours. Push button tail switch - momentary or constant on operation. Shock-resistant/water-resistant. Includes black nylon flapless holster.