The Holographic Hybrid Sight II (HHS II) has anEXPS2-2with aG33.STSmagnifier. Regardless of the scenario, it provides an unparalleled advantage when transitioning from short-range to long-range shooting. The quick switch-to-side (STS) mount offers a simple, instant disengagement of the magnifier. The HHS II combination is the perfect setup for hunting when your target is on the move.Water Resistant: Submersible to 10 ft (3 m) depth; Mount: MIL-STD-1913 rail 1" Weaver; Brightness: 20 brightness settings; Power Source: One 123 lithium battery; Battery Life: Approx. 600 continuous hours at nominal setting 12 at room temp. G33.STS is compatible with all EOTech Holographic Weapon Sights. Fixed Magnification: 3X.