3 LENSES AND 6 MAGNIFICATIONS: There are two lens slots in the head mount magnifier. You can insert one or two different magnifying lenses into the slot at a time. The headband magnifier has 3 replaceable magnifiers including 1.5x, 2.0x, and 2.5x. Higher magnification can be created by combining two lenses together. (3.5x, 4.0x, 4.5x). RECHARGEABLE AND BUILT IN LIGHT: The rechargeable magnifier via USB (included), can be fully charged quickly. The built-in light of the magnifier has 2 brightness levels, which can provide you with brighter and clearer visual effects. You can adjust the lighting angle according to your needs thanks to the rotatable LED light. FLIP UP AND COMFORTABLE DESIGN: The magnifying glass has a soft nose pad and is comfortable to wear. The non-slip frame of the magnifying glass saves you from worrying about slipping off. When the dual-lens combination is not required, you can easily flip the front lens up thanks to the flip-up design. STORAGE BOX AND 5H HARDNESS LENS: The storage box and bag can store the lens and magnifying glass and prevent them from being worn and scratched. The surface hardness of the lens reaches a 5H level, ensuring wear resistance and durability. WIDE APPLICATION: The hands-free headband eyeglasses magnifier can be used for different purposes: watch repairing, reading, arts crafts hobby, sewing, jewelry making, painting, observing, soldering. Any questions, please contact us.