Red 6 MOA Dot Utilizing Our Trademarked STIG-RS™ System For the RMSc/407k/507k Footprints Shake Awake/Motion Deactivated Standby Up to 50,000 Hours of battery life IPX7 waterproof Side Mounted Battery Window Size - 21x16.5mm or 0.83"x0.65" Parallax Free 9 Daytime Settings/2 Night vision Settings Extra Bright Level Kicks it Up to 11 The Cyelee CAT SRS6 PRO red dot Micro Red Dot Sight is an ultra-compact open-reflex sight, designed for compact and subcompact pistols. 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 SRS6 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 our own "Super LED" ensure up to 50,000-hours battery runtime. Window - 21x16.5mm or 0.83"x0.65"