Versatile 5:1 zoom ratio gives you 5 times more magnification at high power than at low power; Professional-Grade Optical System offers unmatched light transmission that's designed to outperform in the most challenging lighting conditions; Guard-ion is a hydrophobic lens coating that sheds dirt and water for a maintenance-free, clear, crisp image; High-Definition lenses provide unparalleled clarity, color, and image resolution at all magnification levels; Integrated, low-profile throw lever makes changing magnifications quick and easy; Comes with an illuminated reticle, which creates a visible aiming point for greater accuracy in low-light conditions; Motion Sensor Technology extends battery life by automatically deactivating illuminated reticles after five minutes of inactivity