Two output levels: High for maximum light, Low for extended-runtime; High to Low output sequence initiated by a momentary press or full click of the tailcap; Virtually indestructible LED emitter is regulated to maximize output and runtime; Parabolic reflector creates smooth, optimized beam with plenty of reach and surround light; Tough polymer body and Mil-Spec hard-anodized bezel; O-ring and gasket sealed for waterproof and weatherproof reliability