4.88 overall. Impact resistant. Water resistant. Tailcap switch. LED with MaxVision beam. Modes: High (800 lumens, 1.5h runtime), Low (15 lumens, 52h runtime). 115m beam distance. Parabolic reflector. Polycarbonate window. Black Nitrolon body with aluminum bezel. O-ring and gasket sealed. Requires (2) CR123A batteries (included). Clam packed.