Frame made of cast aluminum. Two modes of reticle brightness operation; manual and auto-brightness. One hundred percent waterproof, fog proof and shockproof. Fully rubberized armor coated. 1x parallax free. Weight: 13 ounces. Operates with one AAA battery (not included) with approximately 1000 hours of battery life. Auto Shut off Function after 2 hours. Built in Picatinny rail mount. Lower 1/3 co-witness. Adjustable click value 1/2 MOA. Variable reticle style with four options.