TheFolomov 26650Sis an innovative and compact flashlight that can be used for a wide range of tasks and lighting needs - indoors and out. Powered by just one 26650 li-ion battery (included), its 5 CREE LEDs can produce 2000 lumens for up to 3 hours and as little as 80 lumens for 2 and a half days! The singular multi-functional tail switch provides you complete access to the dual setting modes and their sub-modes without having to move your hand. With a series of presses or press and holds, (as specified below) you can stay in illumination mode with standard brightness settings, or choose the tactical mode to give you quick access to the turbo and special signaling modes. These modes and additional sub-modes ensure that you have the lighting and preferred settings best suited for the task or situation at hand. The optional modes of lockout and countdown timer provide extra protection from accidental activation and over-use.