11 layer fully multi-coated optics for excellent clarity; 1 inch mono-tube chassis for superior strength; Speed selector ring - speeds from 250 to 425 fps; XB1 SR Reticle; Glass etched reticle with red and green illumination; Rheostat on saddle offers 5 levels of brightness; 1/2 MOA low profile "no-snag" fingertip turrets; Fast focus eyebell and high torque zoom ring; Waterproof, Shockproof, Nitrogen purged; Hawke Worldwide Warranty