SIG Sauers ROMEO5 Compact Red-Dot Sight packs leading optical performance into a lightweight package. MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not, which helps optimize operational safety and improves battery life. Low Dispersion (LD) glass and aspherical lens design delivers a distortion-free image with edge-to-edge clarity. 2-MOA red dot provides 10 illumination settings (eight daylight plus two nightvision) for visibility in virtually all light conditions. Side-loading CR-2032 battery for quick battery replacement without having to remove the sight from the firearm. Integrated M1913 Picatinny interface. IPX-7 waterproof rating. SIG Sauers Infinite Guarantee and limited five-year electronics warranty. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: 1X20 2 MOA. Color: Red. Type: Electronic Sights.