The RXB-IV is the first binocular/digital laser rangefinder that delivers more than the straight line distance to the target. Leupold’s exclusive True Ballistic Range technology gives you a much more ballistically accurate measurement, for greater precision in long-range shooting. Accurate ranging out to 1,500 yards, the 9x magnification gives you plenty of power, with a wide field of view to track movement. Rugged, waterproof construction and a digital compass includes a declination setting for navigation. Objective lenses are threaded to accept Leupold Alumina accessories. Includes two Alumina BXL Optimizers, to improve contrast in difficult light. True Ballistic Range provides accurate aiming information matched to the performance of your rifle or bow. The Match 13 Reticle System means you’ll always have fast access to each of the 13 reticles, so you always have the right reticle for any situation.