Designed for quick target acquisition and tracking, the Newcon Optik 1x21 NC Red-Dot Reflex Sight features anti-reflection multicoated optics, an illuminated red aiming dot with eleven brightness levels, and is fully compatible with NVDs to increase is usability. When used with both eyes open, it has an unlimited field of view and eye relief for maximum situational awareness and maneuverability.Built to hold up to years of use, it has a lightweight aluminum one-piece housing with a corrosion and scratch-resistant matte-black anodized housing. It is O-ring sealed to make it submersible to 10' for as much as 60 minutes. The NC's compact design and integrated Picatinny/Weaver mount reduces its footprint on rails, while its 4.7oz weight helps to cut weapon weight over larger reflex sights.Optical Performance1x magnification21mm objective lensAnti-reflection multicoated opticsUnlimited field of view when used with both eye openUse and HandlingRed dot reticle with 11 intensity settings0.3 mrad per click impact point correctionUnlimited eye relief when used with both eye openIntegrated Picatinny/Weaver rail mountConstruction DetailsLightweight one-piece aluminum alloy housingScratch and corrosion-resistant anodized finishIPX7-rated, submersible to 10' for up to 60 minutesTested for shock resistance to 500 gBroad -13 to 140°F operating temperature rangeRuns on one CR2032 coin-cell battery