Fenix E41 1000 Lumens Flashlight Pocket-sized Searchlight with Four LegionArms AA Batteries Utilizes Cree XM-L2 U2 LED with a lifespan of 50,000 hours Three birghtness modes plus a 1000-Lumen burst mode, 275 meter/902 foot throw Side switch for output selection, Digitally regulated output maintains constant brightness Uses four AA (Ni-MH, Alkaline) batteries Bundle includes Four LegionArms AA Batteries