Features: 12 Brightness Settings: 12 Brightness Setting: 10 DL & 2 NV Compatible Convenient Tray Battery Compartment Parallax-free & Unlimited Eye Relief Multilayer Coatings: Holosun red dot sights and magnifiers are manufactured using optical glass with multilayer coatings applied to facilitate maximum light transmission and wear resistance while reducing glare. Features/Specifications: Parallax free with unlimited eye relief | Push button controls and streamlined housing design Shake Awake Motion based on and off | Low mount and 1/3 Co-witness mount included |Adaptable to Picatinny and Weaver rails | CNC machining with T6061-T6 aluminum housing. Solar Failsafe: Holosun's Solar Failsafe Technology is an innovative feature pioneered by Holosun in red dot sights. Solar Failsafe allows the red dot sight to remain powered when your battery fails.Holosun optics with Solar Failsafe feature automatic brightness adjustment; when you're under the sun you have a bright reticle, when you move indoors it will automatically dim down to match ambient lighting conditions.Specifications: Reticle: 2 MOA Dot Light Wavelength: 650nm Reticle Color: Red Parallax Free: Yes Unlimited Eye Relief: Yes Magnification: 1x Multi-Coatings: Yes Power Source: Battery Battery Type: CR2032 Battery Life (Hours): 50000 Brightness Setting: 10 DL&2 NV Window Size: 20mm Diameter Dimension (in): 2.45x1.43x1.6 Weight (oz): 2.82 Housing Material: 6061 T6 Aluminum Surface Finish: MAO Adjustment per Click: 0.5 MOA W&E Travel Range: 50 MOA Storage Temperature: -40~70 Working Temperature: -30~60 Submersion: IP67 Vibration: 1000G