This Dual Color Open Red-Dot Scope from TruGlo gives you two choices of reticle color (red/green) for contrast against any target or background. Lightweight, compact design features a 24mm x 34mm window for ultra-fast target acquisition and a wide field of view with unlimited eye relief. Anti-reflective coating helps reduce lens glare. Parallax free from 30 yards. Integrated Weaver-style mounting system for fast and simple mounting. Operates on one 3V-CR2032 battery (included).