The Trijicon MRO (Miniature Rifle Optic) SD is a sealed, miniature reflex sight intended for use on rifles, carbines, and shotguns to provide fast target acquisition. The large aperture and tapered light path maximize the viewing area and allow for better situational awareness and fast target engagement. Combine all this with the ambidextrous brightness controls, sub-flush adjusters, advanced lens coatings and the fully sealed, waterproof, hard anodized forged 7075-T6 housing, and you have the ultimate mini reflex sight on the market. The MRO SD features a re-engineered objective lens allowing for enhanced optical performance and magnifier compatibility. The MRO SD is also equipped with improved windage and elevation adjusters designed to maintain stricter zero retention requirements under drop and recoil. Product Features Faster target acquisition Ambidextrous brightness control Easily adjustable brightness settings Built to handle the worst Recessed adjusters Superior quality glass lenses Long-lasting power Limited lifetime warranty Enhanced optical performance Improved windage and elevation Product Specifications Length x Width x Height: 2.9 in x 1.7 in x 2.1 in (73.66mm x 43.18mm x 53.34mm) Weight: 4.8 oz. (136.08g) Magnification: 1x Objective Size: 25mm Reticle Pattern: 2.0 MOA Dot Day Reticle Color: Red Night Reticle Color: Red Bindon Aiming Concept (BAC): No Illumination Source: LED Illumination Settings: 8 Power Source: 1 CR2032 Lithium Battery Battery Life: 2.5 years of continuous use at day setting "3" (setting 5 of 8) at 70 F (21 C) Adjustment: 1/2 MOA Per Click Adjustment Range: 70 MOA Total Travel Eye Relief: Infinite in. Mount: Not Included Housing Material: 7075-T6 forged aluminum F Finish: Matte Black Submersion Depth: 100 ft. (30m)