Features: This monocular coated with FMC lens,ensuring that enough light enters into the telescope for brighter, sharper images. This10-30X50 monocular for adults and kids is ideal for wilderness explorers in climbing, hiking, driving, racing, traveling, bird watching, sightseeing, hunting. [10-30*50 HD Monocular] With 10-30 times magnification,the lens adopts multi-layer coating to ensure clear and bright images, improve observation comfort. [Built-in BAK-4 prism] Higher refractive index than ordinary prisms, minimizing glare, reflections and halos around lights for sharper images [Ideal gift] Excellent gift for family, lover, friends, enjoy the best of outdoor adventure, bird watching, hunting, hiking, camping, travel, and wildlife scenery. Package 1xMonocular Specification: Item:Monocular Eyepiece diameter: 20mm Magnification10x-30x Color:Black Coating: FMC Prism: BAK4 Size166*51mm/6.53 * 2.0inch Weight: 368g