This US Optics ER25 5-25x58 riflescope with HORUS H-37 reticle features a turret parallax left side focus, low profile rapid focus eyepiece, matte black type III hard anodizing, 12 position digital illumination, US#3 .1 mil windage knob, and a EREK .1 mil elevation knob with 110 clicks per revolution.