Specification:Light weight: 90g (3.1 oz).Objective lens diameter: 21 mm.Eyepieces: 12mm in diameter.Close Focus: approx. 2.5mCompact size: Overall length: 105 mm. Diameter: 33 mm.Fold down rubber eyecups: Convenient for use whether or not you wear eyeglasses.Magnification: from 15 x to 55x adjustable magnification levels， brings objects 15 times up to 55 times closer. Features:Adjustable focusVery handy to carry around and easy to use.Fully multi-coated blue lens to achieve outstanding performance by minimizing light reflection， increasing light transmission and brightness. You can see a distant object even when it is getting fairly dark.Package includes:1 x Monocular1 x Hand Strap1 x lens cleaning cloth