4 interchangeable lenses: 4 replaceable or interconvertible magnification lenses 1.5 x 2 x 2.5 x 3.5 x. View your work pieces or enlarged text up to 350 percent of its original size with great clarity. comfortable to wear: adjustable headband for head to wear more comfortable and adjusted head. Lightweight material and soft breathable sponge inside let you feel comfortable during operation simultaneous use: the visor can be tilted up and down as needed and moved when you need it no longer. Two handles on each side can adjust the height of the magnifier to meet the required viewing Angle. Our durable lens construction and sturdy frame allow you to carry it with you when you're on the go. wide application: the magnifier can meet your needs for many USES. Magnifier for mounting on the head. Perfect for jewelry, reading, painting, repair, sewing, welding, jewelry making, embroidery, artistic crafts and other hobbies. a suitable gift: for the elderly or for those who need an observation and repair, our headmounted magnifier is a good gift choice.