TruGlo Dual Color Open Red Dot Sight features a 5 MOA reticle for quick acquisition, 2 choices of reticle color for contrast against any target/background, adjustable rheostat for brightness control, unlimited eye relief, water and shock resistant, click windage and elevation adjustment, and has a wide field of view. Also featuring a 24X34mm window for ultra-fast target acquisition, anti-reflection coating, integrated Weaver style mounting system, and an included 3V-CR2032 battery.