While being supremely compact, this tactical flashlight with Led technology is sturdy and dependable enough to withstand the recoil of the most powerful firearms. Fully made of metal and perfectly waterproof, it also comes with a Quick Release mounting system that will instantly fit any Weaver or Picatinny rail. Specifications: Waterproof Led Type Cree-xpg-2 Power Output 360 Lumens - 3w Battery Type Cr2 Lithium (Included) Length 2.47a ^2-62.2mm Bezel Diameter 1.55a ^2 - 39.3mm Body Width 1.57a ^2 - 39.8mm Quick Release Mount Suitable For Weaver/picatinny Rail Flashing Function