TruGlo's Tru-Brite Dual Open Red/Green Dot Sight has two choices of reticle color for contrast against any target or background. An unlimited eye relief gives a wide field of view for ultra fast target acquisition. The target side of the 34mm lens is coated for anti-reflection and is parallax free from 30 Yards. It has a integrated weaver-style mounting system and (3V-cr2032) batteries are included. This model has a single 5 MOA dot reticle.Light, bright, and fast, Tru-Brite opens up your world of optical sights while maintaining sloped aluminum sidewalls for increased strength and cover from glare and reflection. Dual color illumination allows you to select a red or green reticle to obtain better contrast against your target. Features: Durable/compact design Unlimited eye relief Wide field of view 34mm window for ultra-fast target acquisition Anti-reflective coating on target side Parallax free from 30 yd Integrated Weaver style mounting system