React Technology effective from 330-265 fps.  Fiber optic yardage indicators.  2nd and 3rd axis adjustment.  100% aluminum construction.  Tool-less micro-click windage and elevation adjustments.  Lens retainer ring (lens not included).  Sight light included.  Stainless steel hardware.  Combining React Technology with all of the features of a high end target sight, the React One Pro from Trophy Ridge will change your idea of what a single pin adjustable sight can do. Faster and more precise than other adjustable sights.  The React One Pro will deliver year after year, hunt after hunt. The fiber optic yardage indicators will allow you to adjust in a hurry and with deadly accuracy. This top of the line sight does it all.