Gerbert Expert-M Flashlight. 5 3/8" overall. Rugged lightweight aircraft grade aluminum body with Type III hard anodized black coating. Lumen output exceeds 100 lumens for over 60 minutes - regulated circuitry for consistent output. Large tail cap button for momentary use and signaling - easier to use while wearing gloves. Reversible universal clip; attachable to MOLLE webbing; para-cord adaptable. Waterproof to 3 meters. Uses two CR123 lithium batteries.