Features Overview: Jewelers Illuminated 40X High Led Lighted Powered Magnifying Light Loupe Jewelry It is widely used in industrial purpose, circuit board and printing industry, medical science, gardening, coins and stamp, education, geography, house living and offices etc¡­ Magnification: 40X Lens Diameter: 21mm Illumination: 2-LED Lamps LED Power: 3x LR927 batteries(The batteries Not included) Size: 45 x 25 x 25mm Weight: 68g