Stylish and modern opera glasses with handle/chain Beautiful design and durability built to last 100% quality materials used and tested extensively 3X magnification for indoor viewing, Specially suitable for theater Since this product is not a professional optical lens. It is more ornamental compared with the practicality Delivery Metal: 1 Magnification: 3 times Lens diameter: 25 mm Diameter of the eyepiece: 11 mm Diameter of the exit pupil: 8.3 mm Relative brightness: 12.3 Angle of view: 6 Kilometric horizon: 105m/1000m Distance between the eyes: 10mm Closest focus: 3.5 m Interpupillary distance adjustment: 58-69mm Optical Coating: FMC Multi-Layer Broadband Coating Prismatic Structure: Paul Prism material: BK7 Product size (width x height): 99 x 54 mm Product weight: 157g