3.88” overall. Tailcap switch. Water resistant. Impact resistant. Clip. Strobe. Weight: 2.8oz. Serialized. Three user selectable programs. TEN-TAP programmable. CR123: High (300 lumens, 1h 45m runtime); Low (40 lumens, 14h runtime); 147m beam distance. AA High (125 lumens, 2h 45m runtime); Low (40 lumens, 15h runtime); 93m beam distance. Requires (1) CR123A battery (included), or (1) AA battery (included). Aluminum construction. Color: Black. Boxed.