Suitable for All Tasks - It comes with 5 interchangeable, detachable lenses and storage box. Perfect use for reading,mechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving, etc. 5 Replaceable Lenses - Single-plate lens magnification: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X, bi-plate lens magnification: 3.0X, 4.0X, 4.5X, 5.0X, 5.5X, 6.0X.you can choose to use them singly or two at a time. Two Bright Lamps - The head magnifiers also has a bright lamp with 2 LEDs, which can be rotated to 60 degrees and is operated with 3 AAA batteries (battery not included),very convenience for you. Adjustable & Comfortable - By using head gear tightening knob,the headband not only can be adjusted to fit all head sizes, but ensure more comfortable and tight wearing. Portable & Multipurpose - The durable construction and the stable frame can be taken anywhere and strong enough to carry anywhere.The light source box can be used separately as lighting source after being dismantled..You'an store products