LaserMax Compact Reflex Red Dot Sight 3 MOA Red Dot Matte Black. 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. Specifications for LaserMax Compact Reflex Red Dot Sight: Manufacturer: LaserMax Color: Matte Black Fabric/Material: Aluminum Magnification: 1 x Objective Window Size: 25x16.7 mm Reticle: 3 MOA Red Dot Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Open Field of View Linear: 0 m to Infinity Battery Type: Lithium Metal CR1632 Battery Quantity: 1 Battery Life: 10000 hours Weather Resistance: Yes Shockproof: Yes Red Dot Sights-Footprint: RMR Lens Type: Glass Adjustability: Adjustable Features of LaserMax Compact Reflex Red Dot Sight : External Light Sensor for Auto Brightness Management 10000 hour run time Brightness settings: 8 Day / 2 Night Shake to awake Reticle: 3 MOA Red Dot Winadage/Elevation Adjustment: 1 click = 1 MOA Operation Modes: Auto brightness or manual adjust RMR mounting footprint Power Source: CR2032 included Package Contents: LaserMax Compact Reflex Red Dot Sight