The Sightron S33-4R is a unique 33mm Electronic Sighting Device (ESD) in Black Matte Finish. Features an eleven-position rheostat for lighting in all situations. The unique four-pattern reticle has a crosshair dot, a 4-minute target dot, an 8-minute target dot within a 75-minute circle, and a 2-minute dot within a dual 4-quadrant reticle. Fogproof, shockproof, waterproof, and is covered by Sightron"s Lifetime Replacement Warranty. Comes with the appropriate ring mounts, front and rear extension tubes, a polarizing filter, a 3 volt CR2302 lithium battery, haze filter caps and an allen wrench for easy assembly. Specifications: Magnification: 1x Objective Diameter (mm): 27 Field of View (ft at 100 yds): 58 Eye Relief: Unlimited Tube Diameter (mm): 33 Length (in): 5.70 Weight (oz): 6.3 Finish: Satin Black