The Millett SP Electronic Red Dot sight provides the ultimate in fast-sighting capabilities. The brightly illuminated red dot contrasts sharply against the background under bright and lowlighting conditions. Redot is waterproof and shockproof. All models have precisionclick adjustments for windage and elevation. The handy dot intensity control switch has eleven settings for quick, fine-tune brightness adjustments. Sighting is crystal clear and parallax free. The 30mm Redot provides the competitive edge with an extra-wide field of view that's wider than any other dot sight available in its class. The quality and performance is guaranteed. Only the best from Millett!