Foldaway precision magnifier with 10x magnification. 3 lens system with achromatic and aplanatic lens for a focused and color accurate image. Contains 6 powerful white LEDs. To analyze banknotes and certain stamps use the integrated long-wave UV lamp consisting of 7 UV LEDs. Glass lens with 5/8 '' (17 mm) diameter. Includes 3 LR927 batteries and protective leather case.