The Pan AV is a durable, high quality sight engineered to give you the advantage of a red dot sight in a compact light-weight, water resistant and shockproof design, whether you use it for rapid fire shooting of moving targets, or normal shooting. The multi-reticle (4 patterned) optical glass lens is parallax corrected, and produces a clear, high resolution image. This 33mm (1.3 inch) in diameter lens allows unlimited eye relief and a wide field of view. The Pan AV is one of the smallest, lightest, most versatile sights of its kind. The following accessories are included: Rubber Lens Cover, Hex Wrenches and Battery.FeaturesLens size: Diagonal 33mm (1.3 inches)Field of View: 15.7mm @ 100m (.6 inches @ 109 yards)Windage/Elevation Adjustments: 1 MOA per clickDot Size: 4 MOADot Brightness Adjustment: 10 settingsBattery: 3v Lithium CR2032Battery Life: User dependentParallax Free @ 50m (55 yards)