Bushnell 353940B Elite 3500 DOA 600 Riflescopes Series Box, 3-9 X 40, Matte 3-D times magnification, 40mm objective, doa 600 cf reticle Fully multi-coated optics are coated with rain guard HD to repel water Magnum recoil-proof construction in a one-piece 1 inch tube Argon purging ensures 100% waterproof, Fog proof and shock proof performance Audible and Resettable windage and elevation adjustments and fast-focus eyepiece