Dimensions: 2.5'' x 1.1'' x 1.2''. Strobe. Water resistant. Impact resistant. LED. Ambidextrous rear-facing toggle switches. Momentary or constant-on flashlight. 136m beam distance. Serialized. 550 lumens with 2.5 hour runtime. Includes four modular rail inserts, 2 spare Allen screws, and Allen wrench. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.