The DRS1X lives up to its namesake with rapid and lethal target engagement at close quarters. - The DRS (Defendu Reflex Sight) is so versatile and effective at close range we’ve named it after the famed Lt. Colonel William Ewart Fairbairn whose Close Quarters Combat system was designed to rapidly disable an opponent with potentially lethal force. Perfect for tactical operations or home defense the 1x reflex sight offers three reticles calibrated for speed and accuracy at 7 25 and 50 yards. - The ultimate CQB sight it is built with Steiner’s legendary ruggedness. Lightweight compact and simple to use. - Included Accessories: Battery Lens Cloth User Guide - Window size is .96 x 1.26 in. (height x width). - The overall height is 2.57 in. and it sites 2.35 in. above the rail. - RUGGED MAGNESIUM BODY - CHOOSE FROM 3 RETICLE OPTIONS - a single dot - dot and stadia lines - dot stadie lines and close dot - SEVEN ILLUMINATION LEVELS (4 DAY/3 NIGHT) - ADJUSTABLE FOR WINDAGE/ ELEVATION - WATERPROOF/FOGPROOF/ SHOCKPROOF - POWERED BY TWO (2) AA BATTERIES BUT CAN OPERATE ON ONE - 2000+ HOURS OF BATTERY RUN TIME - 13-HOUR AUTO SHUTOFF - CO-WITNESS WITH IRON SIGHTS OR USE WITH ANY MULTIPLIER - Magnification: 1 x - Reticle: C2 Reticle - Special Feature: Nitrogen Filled - Finish: Matte Black - Mount: MIL-STD 1913 - Click Value: 05 MOA - Elevation Adjustment Total Capability: 50 MOA - Windage Adjustment: 1/2 MOA - Length: 3.88 in - Weight: 10.4 oz - Illumination Settings: 7 illumination settings - Battery: 2x AA 3000 HRS - Special Features: 3 reticle modes