Widely Accomodating Four .019" horizontal-pin sight perfect for shooting 195 to 330 feet per second React® Technology After only 2 pin adjustments, React® Technology automatically sights in the remaining pins for dead-certain accuracy Innovative Design Make easy, exact corrections with advanced tool-less windage and elevation adjustments Increased Accuracy Improves accuracy over longer distances with second-axis leveling Enhanced Visibility Adjust brightness to suit any shooting condition with the rheostat light