Usage Tips:1.Powerful 40x magnification: The LED and UV jeweler's loupe has a powerful magnification so that you can take a close look at the smallest details. The magnifying glass offers distortion-free magnification. It is ideal for the watch industry, for examining small objects, for reading small texts or for checking precious stones and diamonds.^2. Product with lighting: Even in the dark, the jewelry magnifier with LED and UV light can give you a crystal clear, sharp image. The UV light can also be used to recognize the currency and identify the jewelry. It requires 3 LR927 batteries (batteries are included).^3.PORTABLE DESIGN: Just slide the jewelry magnifier out to use and slide it back into the case when not in use. The storage case allows you to stow the magnifying glass in your pocket or any other place while saving space.^4. Versatile: The eye magnifier is ideal for stone and coin collectors, jewelers, hobbyists, for industrial purposes and also as a great gift for children to explore the fabulous world of tiny things. The eye loupe is made of optical magnifying glass and full metal case, which makes it lighter, more stable, more compact and more useful.