The Holosun Paralow Lightweight Red Dot Sight is packed full of features and design qualities that make this a versatile must-have for any shooter, whether you're on the range or in the field. These Red Dot Sights by Holosun allow you to have greater situational awareness with the ability to shoot with both eyes open using the parallax-free 2 MOA dot to acquire your target. It breaks the mold with an innovative 50,000 hour battery life and an auto wake feature that turns the scope on when it's moved and has an adjustable auto shut-off. The high-grade aluminum construction and weather-resistant finish is waterproof down to 1m, so you can take your Holosun Paralow Waterproof Red Dot Sight everywhere you go in any extreme weather condition. Reduce your training time and increase your accuracy with the Holosun Paralow Compact Red Dot Sight. Specifications for Holosun Paralow HS403B 1x20mm 2 MOA Red Dot Sight: Manufacturer: Holosun Finish: Micro Arc Fabric/Material: CNC Aluminum Magnification: 1 x Objective Lens Diameter: 20 mm Reticle: 2 MOA Dot Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Click Value: 0.5 in at 100 yds Emitter Type: Enclosed Lens Material: Glass Optical Coating: Multi-Layer Reflecting Battery Type: CR2032 Battery Life: Up to 5 years Operating Temperature: 22 - 140 Fahrenheit Water Resistance Level: Waterproof Water Resistant Mark: 1 m Length: 63 mm Width: 30 mm Height: 58 mm Weight: 124 g Included Accessories: Low Mount, 1/3 Co-witness Mount Condition: New Package Type: Box Magnification Type: Fixed Brightness Index: 2NV / 10DL Quantity: 1 Tube Diameter: 22 mm Red Dot Sights-Footprint: Not Applicable Co-Witness: 1/3 Co-witness Attachment Type: Quick Detach, Low Profile Housing/Frame Material: 6061-T6 aluminum Adjustment Range: 0.5 MOA W/E Travel at 100 Yds: 50 MOA Features of Holosun Paralow HS403B 1x20 mm 2 MOA Red Dot Sight: Designed for day and night use Advanced LED technology allows for up to 50,000 of operation 2 MOA dot size Parallax-free with unlimited eye relief Unaffected by extreme weather conditions Rugged and reliable aluminum construction All lenses have multi-layer coatings Improved motion-activated "Shake Awake Technology" Multiple brightness settings Durable PEO/MAO finish Package Contents: Holosun Paralow Red Dot Sight, 2 MOA Dot, Parallax-Free Lower 1/3 Co-witness Mount Low Profile Mount T10 L Key Rubber Cover User Manual CR2032 Battery Lens Cloth