The Trijicon Specialized Reflex Optic (SRO) 2. 5 MOA Adjustable LED red dot is the most popular reticle size and can be used in a wide variety of pistol and other shooting applications such as target shooting or plinking. The wide field of view and clean, crisp dot makes it easy for users to find and track the dot in both target and competitive shooting applications, helping improve shooting accuracy and speed. Every SRO features both manual and automatic.Specifications and Features: Magnification: 1x / Illumination Source: LED Length: 2. 2 inches / Weight: 1. 6 ounces with battery Day/Night Reticle Color: Red / Adjustment @ 100 yards (clicks/in): 1 click = 1 MOA Housing Material: 7075-T6 Forged Aluminum / Batteries: 1 CR2032 Lithium Battery Adjustment Range: 150 MOA Total Travel / Illumination Settings: Automatic and 8 Adjustable Settings (2 NV, 6 Visible)