Boshile 10x42 binocular features: - Genuine Boshile binoculars - Uses 10x high magnification optical lens - Uses wide objective lens up to 42mm - Prism, lens is high-end with high contrast - Lens is fully optically coated - Images are always bright, clear and sharp even at the edge of the lens - Focus distance from 5m to infinity - Has a wide field of view - Inside is filled with nitrogen gas - Outside is covered with NBR rubber to avoid the effects of chemicals and gasoline - Works well in temperatures from -20 to +80 degrees C - Waterproof ability allows use in harsh environments - Uses central focus system for both eyes - Can adjust the nearsightedness of the left eye from +/-4 degrees - Uses a strap