4.5" overall. Water resistant. Impact resistant. Strobe. Rechargeable. SST40 LED. Modes: High (1200 lumens, 2.5h runtime), Mid (400 lumens, 4.5h runtime), Low (100 lumens, 15h runtime), Ultra Low (5 lumens, 150h runtime). 230m beam distance. Built-in micro USB port. Requires (1) 18650A battery (not included), or (2) CR123A batteries (not included). Aluminum construction. Color: Black. Boxed with hanging tab.