Powerdot Archery Green Dot Sight is based on the Steady Dot Tehnology improves accuracy and allows one-look target acquisition. It removes parallax from vision which means you're always on target with accurate groupings and unlimited eye relief. The Sight's vertical adjustment works with virtually any bow, in fact the whole sight is adjustable with one hand for quick ranging. Its notable features is its CNC-machined aluminum body, water- and shock-resistant durability, microadjustable bracket (with a removable quiver mountand) and Glow-in-the-dark yardage tape. The .875" inner diameter of its aperture provides a wide field of view for consistently tighter groupings. Dot intensity can be controlled by the adjustable rheostat. The light-enhancing multicoated lens also has an anti-reflective coating on its target-facing side to promote maximum brightness. Sight is adjustable for both right- and left-hand shooters. Battery included (3V-CR2032).