C4® LED technology, with a 50,000 hour lifetime.  Unbreakable and scratch resistant polycarbonate lens.  C4® LED (white):  1,033 candela peak beam intensity; 48 lumens measured system output; 6.25 hours runtime.  Powered by two (2) “AAA” alkaline batteries (included).  Push button tail switch - momentary or constant on operation.  Tailcap switch for momentary on/off.  O-ring sealed, shock proof and drop-tested construction.  Water resistant per IPX4; in accordance with specification EN 60529:1992.  Tear resistant nylon holster.  Unbreakable pocket clip.  Length x Diameter:  5.3” x .6” (134 x 15mm).  Weighs:  1.64 oz. with battery.