Surefire X300 Ultra X300U-B LED WeaponLight 600 Lumens with 2x Extra Surefire CR123A Batteries and Battery Case Virtually indestructible 1000 Lumen LED regulated to maximize output and runtime Custom TIR lens creates smooth, far-reaching light with a larger center spot beam Integral ambidextrous momentary- and constant-on switching Attaches securely to both Universal and Picatinny accessory rails Includes: 2 extra Surefire CR123A batteries and Lightjunction battery case