Ade Advanced Optics first made its appearance in the firearms accessory industry by doing private label production for several Major manufacturers and retailers. During this period, Ade Advanced Optics began receiving requests from numerous customers for access to the affordable, high quality products that Ade Advanced Optics was capable of producing. By soliciting feedback from both clients and end users in 2010, Ade Advanced Optics was able to overcome the challenges a new company often faces when entering a global market and industry, especially one as competitive as the shooting, hunting, and outdoors industry. Specifications for ADE Advanced Optics APOLLO-PRO Red Dot Sight: Manufacturer: ADE Advanced Optics Color: Black Finish: Anodized Fabric/Material: 6061 Aircraft Aluminum Magnification: 1 x Objective Lens Diameter: 26.5 mm Reticle: 4 MOA Dot Illumination Color: Red Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 1 MOA Emitter Type: Open Battery Type: CR2032 Battery Life: 50000 hours Fogproof: Yes Weight: 1.05 oz Red Dot Sights-Footprint: RMS Features of ADE Advanced Optics APOLLO-PRO Red Dot Sight This ADE APOLO PRO is designed to fit any pistol/mounting plate/slide/optic cut with RMS/RMSC screw pattern/footprint. Equipped with Solar Power that allows the red dot sight to continue to be powered when your battery is out. The battery life can last up to 50,000 hours depending on settings. The APOLLO PRO is always powered on and features an auto-dimming sensor which regulates proper dot brightness based on ever changing ambient light conditions. The brightness will turn high and low accordingly to the environment brightness. Operates with a single CR2032 3v battery. There is no physical on/off/brightness button. The sensor does it all. Ade APOLLO PRO created an iron sight curve at the end of the body, and also added two white dots on the curve. For the rear of part of the red dot to become a back up iron sight Package Contents: ADE Advanced Optics APOLLO-PRO Red Dot Sight Lens Cloth Screws Tools Instructions Rubber Cover Battery