4.6” overall. Strobe. Water resistant. Impact resistant. Weight: 2.69oz. Fits most railed GLOCK Gen 4 or Gen 5 models. 500 lumens. 131m beam distance. 1.5 hour runtime. Concentrated beam with peripheral illumination. Ambidextrous rear on/off switch. Rail grip clamp system securely attaches/detaches quickly with no tools and without putting your hands in front of muzzle. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed.