This is a TruGlo Tactical Dual Color Red-Dot Optic Sight. This 30mm red and green dot sight is designed for fast target acquisition. Features of this sight include two choices of reticle color for contrast against any target or background lighting. It is water proof, fog proof, shock resistant and it attaches and detaches quickly to any weaver or picatinny style bases. Rheostat style power switch for infinite brightness setting in each color. Comes with two batteries and a extra battery storage compartment. This sight comes with a factory lifetime limited warranty and many other features.