Athlon Optics Midas EDC Pro Red Dot Sight Battery: CR1632 Objective Lens: 20.5x16mm Fully multi-coated lens Nitrogen purged Waterproof Fog proof Aluminum construction Motion activated 50,000-hour battery life Auto shutoff after 5 minutes Length: 1.6" Weight: 0.74 oz Magnification: 1x Click value: Linear Elevation and windage adjustable Mount: RMSc Reticle size: 3 MOA Reticle: Dot, Circle, Circle/Dot 10 brightness settings Reticle color: Red Lifetime warranty