3.63'' overall. Impact resistant. Rechargeable. Strobe. Tailcap switch. IPX7 waterproof submersible up to 1.5 meters under water. Osram P9 LED. Modes: Turbo (1200 lumens, 40m runtime); High (600 lumens, 45m runtime); Medium (140 lumens, 3.27h runtime); Low (19 lumens, 9.69h runtime); Firefly (0.4 lumen, 4.5 day runtime). Magnetic charging port. Low battery indicator. Requires (1) Lithium battery (included), or (1) CR123A battery (not included). Aluminum construction. Color: Black. Boxed.