Features: Wearable Magnifier: Wearable design makes it more convenient to use than traditional handheld magnifiers, free your hands and help you see things much clearer. 6 Interchangeable Lens: 3X, 4X, 5X, 6X, 7X and 10X magnifications is interchangeable and can be combined into 21 different magnification to meet your needs. 2 LED Lights: Powered by 3pcs AAA battery, help work in low-light conditions. Wide Application: Perfect for mechanical processing, jewelry appraisal, watch & clock repair, miniature engraving, etc. Attention: With close length: 0.8-6.5in (20-166mm), it is suggested to use a single eye for viewing at area only because focus fail when using both eyes lenses at the same time. Specification: Magnification: 3X, 4X, 5X, 6X, 7X, 10X(can be combined into 21 different magnification) Length: 20-166mm Light Source: 2pcs LED Power Supply: 3 x AAA Battery(NOT INCLUDED) Product Size: Folded: 120 x 160 x 78mm, unfolded: 200 x 160 x 78mm Color: As Shown Material: plastic Package Contents: 1 x Magnifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.