[4 interchangeable lenses] 1.5X,2.0X,2.5X,3.5X,The range of lenses for your needs is individually adjustable,with excellent magnification and the distance between the eyes and the magnifier can also be adjusted. Multiple choices of lenses can meet your various demands [USE] The lenses/magnifiers can be easily assembled and disassembled, and one lens can move a little farther from horizontal to find the angle most satisfying, ideal for close work, such as watchmaking, jewelry making, miniature engraving, electronics or instruments. repairs [Robust and stable] The glasses are very comfortable on the nose, even with the thickest glass. The noseband and forehead are well padded. The protective mask can be used with any pair of glasses, also can adjust the tightness, wearing is not easy to fall off, convenient and work better [More comfortable to use] Lightweight ergonomic frame with soft padding is available for s fit your reading glasses. The headband can not only be adjusted to fit all head sizes, but ensures a more comfortable and snug fit. Reduce pressure on the bridge of the nose, reducing the fatigue.