Functions: The 42mm multi-layer lens with 12x magnification provides a larger field of view, clearer viewing from a distance, and minimizes image vibration. Equipped with BAK4 prism, fully coated (FMC) optical lenses improve image clarity, brightness and pupil spacing. Precise and smooth do focus ring in the middle allows quick focal adjustment. The ring do diopter adjustment can be tuned do your individual vision. Top quality, durable and easy do capture. Suitable do travel, bird watching, spectator sports, concerts or enjoying landscapes. Technical data: Material: glass, rubber Colour black Magnifications: 12x Eyepiece Diameter: 20mm Lens Diameter: 42mm Field of view: 129 meters / 1000 meters Waterproof level: life waterproof Prism: BAK4 Coating: FMC (fully multi-layered) Output pupil distance: 15mm Product Size: 14,7*13*4,2cm/5,78*5,11*1,65inch Product Weight: 730g / 25,74oz List of things do packing: 1 * Binoculars 1 * leash 1 * do carrying case 1 * do cleaning cloth 1 * lens hood; 1 * User Manual (English)