The Discovery Crafts DHR 20 magnifying glass combines safety glasses with a convenient magnifying glass, supporting work that requires precision. Magnification: 1/1.5/2/2.5/3.5/8x. The lens size is 100x43mm. The device features interchangeable lenses with different magnification factors and is suitable for jewelers, watchmakers, and workers in repairs or model construction. Two lenses can be mounted simultaneously. It also includes a small lens for the right eye and has an adjustable headband for a secure fit. It features built-in LED lighting with adjustable brightness and is powered by a rechargeable battery, which charges via micro USB-USB. Interchangeable lenses - 5 pcs. Lens diameter: 100x43 Optical system material: polymer optical glass Lighting: LED power supply 3.7 V 300 mAh Suitable for repairs, jewelry, sewing, and fabric work. Increases magnification up to 6 times and above