Features: Optical acrylic lens features excellent clarity, scratch resistance, and is able to offer excellent distortion-free clarity. It doesn't break or shatter as lenses do. Comes with multiple interchangeable lenses that provide you with different kinds of magnifications, ranking from 1.5x to 4.5x. with two brightness settings provides clearest quality on the object, which is convenient for and watch , jewelry identification, and electronic maintenance. Fit around your head, and hold magnifying glasses on your eyes to let you see smaller objects in a magnified view, lightweight and comfortable to wear. Suitable for professionals, technicians, machinists, hobbyists, craftsmen, or even people that are simply working on projects at home that involve small pieces. Specifications: Material: ABS Color: Black Magnification Times: 1.5X, 2X, 2.5X, 3.5X, 4X, 4.5X Focal Distance: 357mm, 274mm, 204mm, 158mm, 136mm, 125mm : 2 LEDs (2 brightness settings) Power Supply: rechargeable battery(built-in) Battery Capacity: 300 mAh Item Size: 17.5*17.2*6cm / 6.88*6.77*2.36in Item Weight: 102g / 3.59oz Package Size: 18.5*9.5*7.5cm / 7.28*3.74*2.95in Package Weight: 278g / 9.8oz Packing List: 1 * Magnifier 1 * USB Cable 1 * Cleaning Cloth 1 * Pouch 1 * Storage Case 1 * User Manual(English) Optical acrylic lens features excellent clarity, scratch resistance, and is able to offer excellent distortion-free clarity. It doesn't break or shatter as lenses do. Comes with multiple interchangeable lenses that provide you with different kinds of magnifications, ranking from 1.5x to 4.5x. with two brightness settings provides clearest quality on the object, which is convenient for and watch , jewelry identification, and electronic maintenance. Fit around your head, and hold magnifying glasses on your eyes to let you see smaller objects in a magnified view, lightweight and comfortable to wear. Suitable for professionals, technicians, machinists, hobbyists, craftsmen, or even people that are simply working on projects at home that involve small pieces.