Widely used in mechanical processing, electronic repair, jewelry appraisal, timepiece repair and miniature engraving, etc. jeweler watch repair magnifying glasses. LED light source and battery compartment designed separately In order to see the object well, the higher the magnifying lens used, the closer the distance needed from using hands-free glasses legs and headband are interchangeable to ensure more comfortable and tight wearing double left right eye patches magnifying lens/ Magnifying glass with adjustable LED. Eye patches can be moved left and right. Lens Magnification: 10X, 15X, 20X, 25X Color: Black Material: ABS + Optical Lens Package Includes: 1 x LED Magnifying Glasses, 1 x Headband, 4 x Pair of Lenses Please note this is a jeweler watch repair magnifying glasses, Couldnt be used as total presbyopic glasses and cant act on macular disease.