Celestron 71422 Cavalry 7x50 GPS Binocular (Olive Green)br BaK-4 Prisms Increased contrast and resolution for sharper more detailed images br Fully Multi-Coated Optics Increased light transmission through the optical path for brighter images with increased resolution and detail br Integrated Digital Compass GPS Time and Date Integrated LCD provides GPS coordinates elevation compass direction date and time br Integrated reticle to calculate distance and size of objects br Waterproof and Fogproof Ability to use in all weather conditions Nitrogen purged to prevent internal fogging of the lenses