TruGlo Dual Color Open Red Dot Sight features a 5 MOA reticle for quick acquisition and two choices of reticle color for contrast against any target/background. It also utilizes adjustable rheostat for brightness control, unlimited eye relief, click windage and elevation adjustments and has a wide field of view. The Dual Color Open Red Dot also features a 34mm window for ultra-fast target acquisition, anti-reflection coating, integrated Weaver style mounting system. Includes 3V-CR2032 battery and rubber cover.