iKKEGOL 40X 25mm All Metal Magnifier Jeweler LED UV Lens Jewelery Loupe Magnifier (LED Currency Detecting/Jewelry Identifying Type) With light source Battery switch ,can be used under insufficient sunlight or dark environment. Transducer between currency detecting lamp and LED lamp Magnification: 40x Lens Diameter: 25mm Push switch to Turn ON/OFF,Illumination: LED Light & UV light With currency detection function lamp, 3 LR1130 batteries ( Batteries included)