Monstrum Tactical 3-9x32 AO Rifle Scope with Illuminated Range Finder Reticle and High Profile Scope Rings Adjustable 3-9 times magnification, for targeting out to 300 yards and beyond Adjustable reticle illumination with 5 brightness levels in both red and green, allowing for better reticle visibility at night or in low light environments An adjustable objective lens - or AO - that allows for sharper focus of the target image, elimination of parallax, and range estimation A range finder reticle with markings that allows you to estimate range or compensate for bullet drop Aircraft grade 6061 aluminum scope body with a sealed, nitrogen-charged tube for resistance to water and fog S3932-R-RGAORifle Scope High Profile 1 inch Scope Rings Lens covers CR2032 3V battery (installed) Your choice of Black or FDE finish