The EoTech Model EXPS2 Holographic Weapon Sight is built to conserve valuable rail space while enabling rapid both-eyes-open sighting and tracking in a variety of conditions. This model's green holographic reticle features a 68 MOA outer ring with a 1 MOA center aiming dot for use in close to medium range encounters . To get users on target faster, impact point correction is made at 0. 5 MOA per click with a total windage and elevation adjustment range of 40 MOA to compensate for most terrain and conditions. Measuring just 3. 8" and weighing a mere 11. 2oz the EXPS2 has an integrated quick-release Pica tinny/Weaver rail mount for fast and easy removal and re-installation without having to re-zero, is submersible to 33', and is internally fog-resistant. It runs on a single CR123 battery with a continuous runtime of about 600 hours at a medium setting, with 20 selectable intensity levels for use in most lighting conditions. Features: - Circle-Dot Reticle - Green Laser Illumination - 20 Intensity Levels, Auto Shut-Off - 1x Magnification. Parallax-Free - Anti-Reflection Coated Optics - 1/2 MOA IPC, +/-40 MOA Windage/Elevation - Submersible to 33', Fog Resistant - Quick Release Pica tinny/Weaver Mount - Power: One CR123 Battery Includes: - EOTech Model EXPS2 Holographic Weapon Sight (Green Circle-Dot Reticle) - CR123 Lithium Battery Specifications: - Reticle: Circle-Dot reticle Green laser illumination - Magnification: 1x - Window Dimensions: 1. 2 x 0. 85" - Field of View: 90' @ 100 yd. / 30 m @ 100 m, at a 4" / 10. 2 cm eye relief - Eye Relief: Unlimited - Impact Point Correction: 0. 5 MOA per click - Maximum Windage/Elevation Adjustment: 40 MOA - Mounting System: Pica tinny/Weaver - Weatherproofing: Waterproof, submersible to 33' / 10 m - Battery: 1 x CR123 lithium - Runtime: 600 hours, continuous at setting #12 - Dimensions: 3. 8" x 2. 9" x 2. 2" - Weight: 11. 2 oz..