DOA Quick Ballistic Reticle provides 5 drop points with 5 MPH wind hold lines. Free Bushnell Ballistics app - determines exact distances. Durable one-piece body is IPX7 waterproof. Aircraft-grade aluminum with watertight and nitrogen-purged. Turrets are a simple 1/4 MOA per click for easy sight-in. Dusk & Dawn low light performance. Multi-coated surfaces improves image quality. 3-9x Magnification with 40mm Objective lens. Eye relief: 3.5". Second focal plane. Fixed parallax type. Field of view (ft @ 100yds): 37.5ft @ 3x 12.2ft @ 9x. 1" Tube diameter.