The Leupold BX-1 McKenzie HD Binocular reveals more details than other binoculars in its class. The roof prism delivers better resolution, and the compact design feels solid in your hands. It delivers class-leading low-light performance with our Advanced Optical System, which delivers the light transmission, glare reduction, and resolution all recreational sportsmen and sportswomen demand. Its lightweight, compact design is waterproof and purpose-built to handle the harshest conditions. And like all Leupold binoculars, it's guaranteed for life.