Cyelee Optics CAT PRO Reflex Red Dot Sight 1x21x16.5mm 3 MOA Dot Black. It offers robust reliability purpose-built for duty and professional use and ready for any environment. Improved target acquisition intuitive controls and innovative electronics allow you to defend yourself and others confidently. The CAT PRO red dot is easily installed on optics-ready slides or mounts compatible with Shield RMSc or JPoint footprints. It is equipped with advanced MDS Mode(Motion Deactivated Standby) technology to ensure it's also ready to go in the split second you are While on the sight automatically sleeps after 4 minutes of non-activity but quickly comes back to life as soon as it is moved. Its high-quality potted and waterproof electronics and Cyelee own "Super LED" ensure up to 50000-hours battery runtime. Specifications for Cyelee Optics CAT PRO 1x21x16.5mm Reflex Red Dot Sight: Manufacturer: Cyelee Optics Color: Black Fabric/Material: 7075-T6 Aluminum Magnification: 1 x Objective Window Size: 21x16.5 mm Reticle: 3 MOA Dot Illumination Type: LED Illumination Color: Red Brightness Settings: 10 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Open Parallax: Parallax Free Battery Type: Lithium Metal CR1632 Battery Life: Up to 50000 hours Water Resistance Level: IPX-7 Weight: 30 g Package Type: Box Red Dot Sights-Footprint: RMSc Lens Type: Multi Coated Gun Type: Pistol Package Contents: Cyelee Optics CAT PRO 1x21x16.5mm Reflex Red Dot Sight Cyelee Optics X003LR8ZHZ: CAT PRO Reflex Red Dot Sight 1x21x16.5mm 3 MOA Dot Black