The ROMEO-MSR is a sealed compact red dot or green dot sight intended for MSR, carbine, shotgun and air rifle. Brightness is adjusted with a top-mounted rotary dial, featuring 10 daytime and 2 night vision settings for quick target engagement in any condition. Specifications for SIG SAUER Romeo MSR GEN II 1x20 mm Reflex Red Dot Sight: Manufacturer: SIG SAUER Color: Black Magnification: 1 x Objective Lens Diameter: 20 mm Reticle: 2 MOA Dot Eye Relief: 63 mm Adjustment Type: MOA Emitter Type: Enclosed Field of View, Angle: 6.8 degrees Parallax: Parallax Free Lens Material: Rubber Optical Coating: Spectracoat Battery Type: CR2032 Water Resistance Level: IPX-7 Length: 2.7 in Width: 1.8 in Height: 2.5 in Weight: 5.7 oz Quantity: 1 Features of SIG SAUER Romeo MSR GEN II 1x20 mm Reflex Red Dot Sight High-performance lens coatings for excellent light transmission and dot contrast in any situation. Ultra-compact size and weight with unlimited eye-relief and parallax-free operation. Slipover, see-through flip-backs 1.41in T10 Torx M1913 Skeletonized lightweight Riser Mount for absolute co-witness Top loading battery compartment with integral brightness control featuring 10 daytime and 2 NV settings Dependable IPX-7 waterproof and fog-proof performance Package Contents: SIG SAUER Romeo MSR GEN II 1x20 mm Reflex Red Dot Sight CR2032 T10 Multi Tool Rubber Lens Covers