Widely used hands-free multi-power combination lens magnification can meet your needs for different purposes such as reading, drawing, observing, modeling, repairing, sewing, welding, jewelry making and other hobbies/crafts Inner material and soft breathable sponge, comfortable to operate Interchangeable lens head with magnifier Comes with 4 interchangeable lenses with focal lengths of 1.5x (15"), 2.0x (10"), 2.5x (7"), 3.5x (6") Suitable for wearing over reading glasses Ideal for checking small text, images, newspapers, medicine instructions, etc.