Athlon Optics Midas Strobe TSR3 Red Dot Sight Battery: CR2032 Objective Lens: 25mm Advanced fully multi-coated glass Nitrogen purged Waterproof Fog proof Shockproof Aluminum construction Motion activated 50,000-hour battery life Auto shutoff after 5 minutes Length: 2.8" Weight: 6.8 oz Magnification: 1x Click value: 0.5 MOA Elevation and windage adjustable Mount: Picatinny Rail Reticle size: 2 MOA Reticle: Dot, Circle, Circle/Dot 10 brightness settings Reticle color: Red Lifetime warranty