The Trophy Ridge React H4 is a four .019” horizontal-pin sight perfect for shooting 195 to 330 feet per second. After only 2 pin adjustments, React Technology automatically sights in the remaining pins for dead-certain accuracy. Make easy, exact corrections with advanced tool-less windage and elevation adjustments. Improves accuracy over longer distances with second-axis leveling. Adjust brightness to suit any shooting condition with the rheostat light.