Product Features Top-loading battery Upgraded windage and elevation adjusters Rugged, durable construction Large, unobstructed field of view Reliability for everyday carry Complete user control illumination settings Clear target visibility Identical footprint as RMR Improved controls Index ridge alignment aid Button lock-out mode Manual brightness lock-in mode Brightness response setting Forward mounted light sensor Product Specifications Dimensions: 2.15" L x 1.27" W x 1.19" H Magnification: 1X Day Reticle Color: Red Illumination Source: LED Power Source: CR2032 Adjustment: 1 MOA per click Eye Relief: Indefinite Submersion Depth: 65 ft Weight: 1.69 oz Reticle Pattern: 3.25 MOA dot with 55 MOA selectable reticle Night Reticle Color: Red Illumination Settings: 9 brightness settings, 3 NV, 1 super bright Battery Life: Over 3 years of continuous use in brightness setting 5, dot only Adjustment Range: 135 MOA total travel Housing Material: 7075-T6 aluminum Operating Temperature: -40 tp 140F