Vortex Razor UHD Compact Binoculars utilize an ultra-high-definition (UHD) optical system, including APOChromatic lenses, proprietary XR Plus anti-reflective lens coatings, and phase correction for maximum brightness, high resolution, and color-accurate images. Ultra-hard, ArmorTek exterior lens coating protects lenses from scratches and makes it easier to remove smudges, oil, and dirt. Center focus wheel focuses of both barrels at the same time, and is easy to reach and operate. Twist-up eyecups are comfortable with or without eyeglasses. These Vortex binoculars are constructed with a lightweight and rugged magnesium chassis, coated with rubber armor. Argon gas purged for waterproof, fogproof integrity. Includes a premium GlassPak Pro binocular harness, comfort neck strap, rangefinder pouch, lens covers, and lens cloth. UHD optical system APOChromatic lenses XR Plus anti-reflective coating ArmorTek exterior lens coating Lightweight magnesium chassis with rubber armour Center focus wheel and twist-up eyecups Argon gas purged for waterproof, fogproof integrity GlassPak Pro binocular harness Neck strap, rangefinder pouch, lens covers, and lens cloth