Horton has designed this scope with four additional crosshairs enabling you to have a total of five predetermined reference points for varying yardage. Eliminate the guesswork associated with "hold-over". The Mult-A-Range can be used on crossbows with or without Horton's exclusive Dial-A-Range. Engineered specifically for optimum performance on a crossbow, this scope is designed to withstand the harshest environments. It's optically engineered with a 2 1/2-inch eye relief, making it ideal for Horton's compact crossbows. It features fully coated optics, waterproofing, fogproofing, shockproofing, 1/4-minute windage and elevation adjustment, duplex reticle, 50-yard parallax and a limited warranty. (Scope Only)