5.25" overall. Water resistant. Impact resistant. Modes: High (185 lumens, 45m runtime), Medium (119 lumens, 1h 30m runtime), Low (30 lumens, 6h 30m runtime). 97m beam distance. Five selectable programs. Type III hard anodized finish. Full time battery status charge indication. Requires (1) AA battery (included), or (1) CR123A battery (not included). Boxed with hanging tab.