The TRUGLO Red-Dot sight has 2 choices of reticle color for contrast against any target / background. 4 reticle choices for accurate targeting in any shooting condition. Adjustable rheostat for brightness control. Lightweight / compact design. Unlimited eye relief. Water and shock resistant. Click windage and elevation adjustments. Wide field of view. 24x34mm window for ultra fast target acquisition. Anti-reflection coating on target side. Parallax free from 30 yards. Integrated Weaver-style mounting system. Battery included (3V-CR2032). Lifetime Limited Warranty.