Designed for pistol applications, the new Holosun HE509T X2 features Super LED technology with an impressive 50k hours of battery life and Solar Failsafe technology that keeps you powered in the rare event of battery failure. Shake Awake technology activates the LED during periods of motionlessness and can extend battery life to upto 100K hours in some cases. These Red Dot Sights are encased in durable Grade 5 titanium housing that withstands seawater all while keeping fatigue at bay. Specifications for Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight: Manufacturer: Holosun Fabric/Material: 7075 Aluminum Magnification: 1 x Objective Lens Diameter: 0.66 - 0.9 in Reticle: 2 MOA Dot, 2 MOA Dot & 32 MOA Circle, 32 MOA Circle Illumination Type: LED Brightness Settings: 10 Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 1 MOA Parallax: Parallax Free Optical Coating: Multi-Coated Battery Type: CR1632, Lithium Battery Quantity: 1 Operating Temperature: -30 - 60 Celsius Water Resistance Level: IP67 Length: 1.61 in Width: 1.21 in Height: 1.35 in Weight: 1.72 oz Condition: New Package Type: Box Quantity: 1 Attachment Type: Picatinny Mount Type: Picatinny W/E Travel at 100 Yds: 30 MOA Features of Holosun HE509T X2 Enclosed Reflex Optical Sight CR1632 battery port does not require removal of optic from firearm. Improved programming that enhances usability. Addition of Lock Mode: Lock mode locks out the buttons until a deliberate long press unlocks them. Improved glass clarity. Auto mode now runs in the background and offers solar power when there is no battery or dead battery. Up to a 50,000 Hour battery life. Solar Failsafe. Multi-Rectical System (MRS): 32 MOA Circle & 2 MOA Dot; 2 MOA Dot; 32 MOA Circle. Shake Awake Technology. CNC Milled 7075 Aluminum Housing. Reticle Brightness: 10 Daylight & 2 Night Vision Compatible Settings. Package Contents: Holosun HE509T X2 Enclosed Reflex Optical Red Dot Sight RMR-to-509T Adapter T10 L Key User Manual CR1632 Battery Lens Cloth