The LM-CRDS (LaserMax-Compact Red Dot Sight) is a robust sight for mourning on RMR optics ready pistols. The housing is constructed of aircraft grade 7071 aluminum. The LM=CRDS comes equipped with an industry first external forward-facing light sensor which automatically adjust the brightness of the red dot based on ambient lighting conditions. A picatinny mount, mounting hardware and battery are included.Features:External Light Sensor for Auto Brightness Management10,000 hour run timeBrightness settings: 8 Day / 2 NightShake to awakeReticle: 3 MOA Red DotWinadage/Elevation Adjustment: 1 click = 1 MOAOperation Modes: Auto brightness or manual adjustRMR mounting footprintPower Source: CR1632, included