Steiner Optics Predator Series Binoculars - Waterproof and Fogproof Optics for Hunting and Shooting COLOR ADJUSTED TRANSMISSION (CAT) amplifies contrast in the peak human vision sensitivity range, to spot game in any environment. FAST-CLOSE-FOCUS central focusing wheel requires minimal rotation for quick, absolute sharpness from close up to infinity. N2 INJECTION SYSTEM seals 14-psi pressurized dry nitrogen inside the optic, for fogproof clarity in any condition - from artic cold to desert heat. CLICLOC SYSTEM attaches and releases neck strap or harness with instant, push-button ease, and keeps binoculars hanging straight and action-ready. HERITAGE WARRANTY - We stand behind our products. Period! We will repair/replace defective products at no charge for the lifetime of the product. Warranty does not cover damage, loss or theft.