You've never seen a bow sight like this before. It measures the angle-compensated distance to your target and provides an LED pin for the shot. No more jeopardizing your shot by trying to range the animal and then draw your bow. Streamline your shot experience with the Hoyt Picatinny Xero A1i Pro Bow Sight, powered by Garmin. Compatible with Hoyt's In-Line Picatinny System for better bow balance and less weight (Also comes with an adapter for standard sight mounts.)