2.13 overall. Water resistant. Impact resistant. Luminus SST-20-W LED. Modes: High (320 lumens, 3h runtime); Low (35 lumens, 15h runtime). 74m beam distance. Utilizes a TIR (Total Internal Reflection) lens for a smooth and soft beam. 3D pivoting system specifically designed for ARC rails to flexibly adjust the beam angle. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.