Great Field of View and Unlimited Eye Relief. Clear and Sharp 4.0 MOA Dot Sight. No-Reflection High Tech Emerald Coatings. Red or Green Dot Adapts to Any Environmental Background. Optimal Height Design to Co-witness with Iron Sights. Includes Both Smart Adaptor and Straight-up Quick Detachable Tactical Mount with Innovative Quick Detach Mounting Deck to Use on Any Picatinny Rail. Illumination Rheostat with Variable Brightness Levels Offers Stealthy and Infinitely Fine Adjustment. Aim and Instant Lock On Target to Enhance Shooting Accuracy and Performance. Most Versatile Dot Sight for Wide Range of Pistols, Shotguns and Rifles. Features : Clear and sharp 4 MOA dot No-reflection high tech emerald coating Red or green dot Optimal height Unlimited eye relief