Engineered for speed, simplicity and accuracy, the DRS (Defendu Reflex Sight) delivers rapid and lethal target engagement at close quarters. Perfect for tactical operations or home defense, the DRS Reflex Sight offers 3 reticle patterns calibrated for speed and accuracy at 7, 25 and 50 yards. For enhanced accuracy in all scenarios, the DRS's mounting height allows for co-witness with your iron sights. The DRS combines the highest quality optical glass with a rugged magnesium body that's 100% waterproof, shockproof and fogproof. Simple push-button controls make it easy to select your reticle, adjust brightness, and make 1/2 MOA adjustments for windage and elevation. The DRS provides up to 2,000 hours of operation on (2) AA batteries-but it's capable of operating on a single battery in an emergency-and 13-hour shut-off helps preserve battery life. It's a full-featured modern optic, and it's backed by Steiner's legendary Heritage Warranty: if anything happens to your optic, Steiner will repair it or replace it for free. No receipt and no warranty card necessary. C2 illuminated reticle with 3 patterns calibrated for 7, 25 and 50 yards: 2 MOA dot; 2 MOA dot with stadia lines; and 2 MOA dot with stadia lines and close dot 4 daylight brightness settings and 3 night vision settings Auto + manual brightness control allows you to control brightness yourself or allow the unit to sense ambient light Rugged magnesium body can take the punishment of regular use and abuse 100% waterproof, fogproof and shockproof 1/2 MOA adjustments for windage and elevation Up to 2,800 hours of battery life (dot only) Made in USA Backed by the Steiner Heritage Warranty