3” overall. Strobe. Water resistant. Clip. Anti-roll design. Impact resistant. Built in micro USB port. Luminus SST40 LED. Modes: High (990 lumens, 30m runtime), Mid (350 lumens, 2h runtime), Low (88 lumens, 10h runtime), Ultre Low (0.7 lumen, 100h runtime). 185m beam distance. Requires one 16340 battery (not included), or one CR123A battery (not included). Aluminum construction. Color: Black. Boxed with hanging tab.