MULTI-COATED OPTICS AND BaK-4 PRISMS: Multi-coated optics help obtain high resolution and high contrast views, while the prisms made of BaK-4 glass will give you enhanced color fidelity. Enjoy crisp, detailed views and dependable performance with our Outland X all-around binocular.WATERPROOF AND FOGPROOF: Designed to withstand all weather conditions, our Outland X compact binoculars have been filled and sealed with dry nitrogen gas for rigorous outdoor use without internal fogging of the lenses.PROTECTIVE RUBBER COVERING: Our binocular is both durable and well-armored; its rugged exterior ensures protection from all outdoor elements while providing a secure, anti-slip gripping surface. The Outland X is also a great birdwatching binocular.TWIST-UP EYECUPS FOR QUICK ADJUSTMENT: Large focus knobs make for easy and precise focusing, and twist-up eyecups allow for quick adjustment of eye relief to obtain a full field of view. Eyecups can be easily positioned for use with or without eyeglasses.WARRANTY AND CUSTOMER SUPPORT: Buy with confidence from Celestron, a leading optics brand based in California since 1960. When you purchase from an Authorized Dealer on Amazon, you will receive a Celestron Limited Lifetime US Warranty and unlimited access to technical support from our team of US-based experts.