This is a TruGlo Triton 30mm Red-Dot Optic Sight for Tactical Firearms. Specifically designed reticle for tactical style firearms. Tri-color illuminated reticle allows choice of red, green or blue for faster target acquisition in low-light conditions. Bonus remote pressure switch and extended cord for convenient on/off control. Illuminated ring represents a 20" circle at 25 yards. Detachable, extended sunshade eliminates glare from the front lens. Shock resistant to 1000g. Waterproof / fog-proof. Unlimited eye relief. Wide field of view. See-thru / flip-up lens caps, optical-quality / all-weather. Adjustable rheostat for brightness control. Lightweight / easy to mount. Multi-coated lenses produce more than 95 percent light transmittance. Special anti-reflective interior eliminates stray light from appearing inside the sight. Click windage and elevation adjustments. Integrated lanyard system prevents loss of screw-down W/E caps. Integrated Weaver-style mounting system. Battery included (3V-CR2032). Lifetime Limited Warranty from the manufacturer.