Great Eye loupe is great for rock collectors, coin collectors, jewelers, hobbyists, and also makes a great gift for the kids to explore the fabulous tiny world. Store the Folding Magnifier in your pocket or purse, it is very convenient to carry and you can use it anywhere. It requires 3 LR1130 batteries (Batteries are Included). You can see objects clearly in dark or insufficient light conditions with this dual LED light source. Has UV light for Counterfeit Identification of Paper Currency, Passports, Paintings, Geology Study. Foldable Design: Just Pull Out the Jewelry Magnifier to Use, and Put It Back When Not In Use. This 40X magnifying glass Illuminated Jeweler Loupe is built from durable metal with an optical glass that is 25 mm in length and has a dual bright LED light.