Great Eye loupe is ideal for rock collectors, coin collectors, jewelers, and hobbyists. It also makes a thoughtful gift for children to explore the fascinating small details of the natural world. The folding magnifier is compact and easy to carry in a pocket or purse, making it convenient for use anywhere. Powered by 3 LR1130 batteries (included). Features dual LED lights to provide clear visibility in low-light or dark conditions. Includes a UV light for detecting counterfeit currency, passports, artwork, and for geology examination. Foldable design: simply pull out the jewelry magnifier to use and fold it back when not in use. This 40X illuminated jeweler's loupe is constructed from durable metal and equipped with an optical glass lens measuring 25 mm in diameter. The built-in dual bright LED lights enhance visibility for detailed inspection tasks.