LITERITEï¿½ Auto-Adjust 3-Dot Red Dot Sight (INTEGRAL MOUNT for Horton Models Only) This new sight features an electronic sensor with an "auto" setting that automatically adjusts the brightness of the 3 aiming dots depending on the amount of daylight. Six additional manual positions allow the selection of lower or higher brightness settings. The three aiming points are 3-MOA size and are calibrated in approximately 10-12 yard increments with arrow speeds of 300 FPS. Waterproof and fog proof. 42mm tube. Weight: 6oz. Length: 5.5"; FOV @ 50yards: 29 ft.