CREE LED technology - 50,000+ hours LED; Momentary or constant-on flashlight; Sharp focused beam; High-efficiency deep parabolic reflector; Effective beam distance of 190 meters (over 620 feet); Glass-filled nylon polymer housing; Aircraft-grade 6061-T6 aluminum tail-cap with Type III hard anodized finish; Non-slip grip; Large textured tail-switch; Waterproof, impact and chemical resistant; Powered by two CR123 batteries (included)