Apex Gear Red-Dot 30mm Crossbow Sight Special 3-dot reticles include decending diameter MOA's for multi-distance shooting. Dual-color rheostat for multiple brightness settings in red and green. Spare battery storage compartment. Click windage and elevation adjustments. Integrated Weaver-style mounting system. See-Thru/Flip-up lens caps, optical-quality/all-weather. Removable sunshade included. Lifetime Limited Warranty.