The TRUGLO Red-Dot sight has a Specially designed reticle for turkey hunting. Dual-color reticle illumination (red and green). Illuminated ring represents a 24" circle at 30 yards. Detachable, extended sunshade eliminates glare from the front lens. Main battery and spare battery included (3V-CR2032). Shock resistant to 1000g. Waterproof / fog-proof. Unlimited eye relief. Wide field of view. BONUS! 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. Click windage and elevation adjustments. BONUS! Integrated lanyard system prevents loss of screw-down W/E caps. Integrated Weaver-style mounting system. Lifetime Limited Warranty.