The Trijicon RMR HD Red Dot Sight (RMHD1-C-3200001) is a rugged optic for law enforcement and military duty. Forged aluminum, durable electronics, quality lenses, and an expanded window support reliable performance.A forward-facing sensor adjusts auto illumination to target-area brightness. Select reticles, tactile controls, and a top-load battery streamline operation; the RMR footprint fits many duty holsters.55 MOA segmented circle, 1 MOA dotAdjustable red LED; nine brightness settingsForward-facing light sensor; auto adjustmentNight-vision compatible; super-bright modeAluminum housing; top-loading batteryFour-year continuous use at brightness fiveBuilt for dependable duty use and rapid acquisition.