This Sightron S-Tac scope comes with a number of features that make it the ideal scope for variety of shooting needs. It has a fast focus eyebell for quick and easy adjustments, resettable low profile turrets with 1/4 MOA adjustments that are pull-up resettable to zero, parallax adjustment from 10 yards to infinity, rugged turret cap covers for optimal protection in the field and illuminated rheostat that offers 11 brightness settings with easy off between each intensity level. The illumination control is powered with a single CR2032 battery. This scope utilizes the Exac Track, which is a windage and elevation system unique to Sightron that delivers uncompromising performance. This scope offers Zact-7 Revcoat multi-coating technology for fully multi-coated precision ground glass and ED, extra low dispersion glass. It is waterproofed against rain, snow and humidity. It is built to withstand the shock of the toughest loads and it is nitrogen gas charged to prevent fogging or any internal water buildup.