The new ProStaff 550 is a pocket-sized, waterproof rangefinder that will accurately measure distance from 11 yards to 550 yards with Nikon’s trademark precision. The ProStaff 550 is the perfect size and profile for any hunt. It is easy to use in the field with a high-contrast LCD display, single button control and a continuous tracking feature that allows for ranging of multiple or moving targets. The ProStaff 550 is unaffected by extremes in temperatures, so consistent ranging can be accomplished in even the toughest hunting conditions.