10x42 HD monocular: The monocular with 10x (real data) magnification and an objective lens with 42 mm (real data) diameter delivers clear, bright images. Large field of view of 1000 meters, make the picture clear and bright.BAK4 prisms The latest optical technology, the monocular telescope, equipped with a BAK-4 prism and a fully multi-coated lens, superior light transmission and brightness as well as a light transmission of up to 99.5%.Durable: These monocular binoculars are waterproof, fog-free, dust-proof. That your monocular telescope offers maximum performance even in all temperatures and weather conditions.Wide application: Ideal for hunting, climbing, bird watching, zildlife and scenery, concerts, sports, hiking, camping and traveling to watch. Ideal gift for adults, children and outdoor enthusiasts.