Powerful 12x magnification is ideal for use in wide and open terrain such as the American West, where extreme long-distance observation and identification are common,42mm objective lenses draw in the light required to extend its use in challenging conditions without being too bulky or heavy Eaglet 12x42 features an optical system created from lead-and-arsenic-free Eco-Glass. Fully Multilayer coatings, which provide high light transmittance across the entire visible light spectrum, are applied for bright images. High-reflectivity silver-alloy mirror coating applied on the mirror surfaces of the prisms for a bright and clear view. Whether you're spotting birds near the water's edge or caught in inclement weather, you won't have to worry about binoculars. Nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme temperature changes and environmental conditions Come with the universal smart phone adapter helps you capturer Image what you see in Distant, Tiny World. Explore the nature of the world easily through your screen, Share your life, share what you like to your family and friends. The roof prism design and closed-bridge configuration provide a compact and comfortable form factor. High-eyepoint design provides ample space between your brow and the eyecups for a clear field of view, even when you're wearing glasses, The large slip center focus wheel allows for precise focus control, even while wearing gloves. Dioptric adjustment and a wide interpupillary range allow for easy use by a wide variety of people.