Features: Left & right double eye patches magnifier/loupe with adjustable LED. 4 Pairs of replaceable lens with different magnifications. LED light source and battery compartment are designed separately. Handsfree eyeglasses legs and headband are interchangeable to ensure more comfortable and tight wearing. Eye patches can be moved leftwards and rightwards, and can rotate 180 degrees upwards and downwards. Widely used in mechanical processing, electronic , jewelry appraisal, timepieces and miniature engraving, etc. Specifications: Lens magnifications: 10X, 15X, 20X, 25X Battery: 3 * 2 LR1130 batteries Color: Black Material: ABS + Optical lens Package size: Approx. 14.7 * 12.2 * 6.1mm / 5.8 * 4.8 * 2.4in Package weight: Approx. 163g / 5.7oz Package includes: 1 * Eyewear magnifier 1 * Headband 4 * Pair of lens 1 * User manual (English & Chinese) Left & right double eye patches magnifier/loupe with adjustable LED. 4 Pairs of replaceable lens with different magnifications. LED light source and battery compartment are designed separately. Handsfree eyeglasses legs and headband are interchangeable to ensure more comfortable and tight wearing. Eye patches can be moved leftwards and rightwards, and can rotate 180 degrees upwards and downwards.