3.2” overall. Strobe. Water resistant. Impact resistant. Tailcap switch. Weight: 2.74oz. 500 max lumens. 1.5h max runtime. 140m beam distance. Independently operating push-button switch or remote pressure switch. Safe off feature. Concentrated beam with optimum peripheral illumination. Integrated rail clamp attaches to MIL-STD-1913 rails. Includes remote retaining clips, double-sided tape, and zip ties. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.