This is a name brand 4 reticles sight Priced well below minimum advertised price Made by Ade Advanced Optics A ultra-compact Lightweight panorama multi-reticle RED reflex sight Tubeless design with 33mm reflex lens aperture provides a wide field of view, suitable for CQB rapid-firing or shooting of moving targets besides normal shooting. Multi-Reticle (4 patterns) illuminated in RED are installed with 7 levels intensity adjustment per color. Parallax corrected and unlimited eye-relief. Allen head screw type wind age and elevation click adjustments, with locking screw. Made by Ade Advanced Optics. Lifetime Warranty !! THRU US !! Built-in mount (integrated rail) for standard Weaver or Picatinny bases, no need to be zero when remounting the dismounted sight. Very light weight. Low power consumption for long battery life. Rubber lens cover and Allen wrenches included Power: 1x Field of View: 15.7m@100m Field 0.V. 1 click - 1moa Mount: Built-in rail mount fits onto Weaver or Pica tinny base Length: 3 1/5" Weight: 3.9oz Unlimited eye relief Standard Weaver Mount Fits easily on handguns, shotguns and rifles Powered by 1 lithium battery 2032(included) Lightweight Built-in Weaver mount Lightweight Water resistant Shockproof Rubber lens cover included. Model number : rd400