Hybrid design featuring a skeletonized steel chassis, molded into a high-strength polymer housing; Molded glass aspheric lens for a distortion-free sight picture; High efficiency point source LED emitter with 8 individual brightness settings; Large side control button for easy reticle adjustments; Convenient side-mounted CR1632 battery tray with security screw for easy access without removing the optic from the firearm; Minimum continuous runtime of 20 000 hours (at medium setting, dot-only); MOTAC (Motion Activated Illumination) that powers up when motion is detected, powering down when inactive; Romeo-RS Pro is suited for the optic ready P320, P226 and P229 Family of pistols; Designed, developed, tested and assembled in the USA