Trophy Ridge's React Pro One Pin Sight features the dialed-in accuracy of a one pin slider sight and React Technology that allows you to sight in less than 10 minutes so you can spend less time preparing to hunt and more time hunting. React technology accurately predicts pin gaps based on the distance between your 20-yd. pin and any other yardage for super-easy set up for accuracy between 20 and 100 yds. Fiber-optic indicators let you easily see your distance markers even in low light. Second and third axis leveling is ideal for downhill shots in steep country or out of a treestand. Machined aluminum construction withstands tough conditions. Click microadjustments for both windage and elevation. Compatible with magnifier lens (not included). Rheostat light illuminates your pin for low-light shots. Multiple mounting holes. Stainless steel hardware. Includes 10 custom sight tapes.