The Hawke Sidewinder Tactical rifle scope provides exactly what a tactical shooter needs. This high quality scope features a side rheostat, coil erector spring, fast focus eye piece, 100mm side wheel for parallax adjustments, locking/resettable exposed turrets, and is covered by the Hawke worldwide warranty. Turrets can be ballistics matched to your ammunition using the BRC software that is free from manufacturer website. Illumination is powered by one CR2032 lithium 3-V battery. Comes with threaded lens covers to keep your glass scratch free.