The Primary Arms 1-4X24 illuminated scope features a duplex center dot reticle. Eye relief is a generous 3.5-4.9" depending on magnification. The brightness knob to the left side of the tube illuminates the center dot through 12 brightness settings. This durable optic is waterproof, fully multicoated, and fog resistant, with a 1-year warranty. Turret caps cover finger adjustable ½ MOA per-click windage and elevation knobs. An adjustable ocular ensures the reticle is sharp for your eyes. This tough scope is waterproof, fog resistant, and covered by a 1-year warranty.