Your riflescope isn't a fixed power, so why should your binoculars be? This idea was the driving force behind the new Golden Ring Switch/Power. Switch/Power™ Technology features a precision-machined front switch on the focus ring that instantly changes the power setting. Now you have the benefit of carrying two pairs of binoculars in one. Scan at 7X, and with the flip of a switch, you can get a better look with 12X. The same can be done with the 10X to 17X model. The fully multicoated lens system gives you superb brightness, resolution, contrast and color. Phase-coated prisms eliminate diffraction and ensure clarity. And since Leupold paved the way for the truly waterproof optic, it developed an even more reliable waterproofing design using an Argon/Krypton gas blend. This ensures that your binoculars will be fog free for a lifetime of use. These binoculars are ready for use with any standard tripod mount, making them even more versatile for the field. Rugged, waterproof and guaranteed for life by Leupold's Full Lifetime Guarantee.