Product Description: Batteries: 3*LR1130 (included). Voltage: 1.5V. Lens Diameter: 25 mm. Magnification: 40x Weight: 158 g Suitable for: industrial purposes, medical sciences, coins and stamps, geography, circuit boards and printing, home and office. Package Contents: 1 * Magnifying Glass, 3* Battery Description: Powerful 40X Magnification: The LED and UV jeweler's loupe boasts powerful magnification, allowing you to get a closer look at the smallest details. The magnifying glass offers distortion-free magnification. It's ideal for the watchmaking industry, examining small objects, reading small print, or inspecting gemstones and diamonds. High-Quality Illuminated Product: Even in the dark, the jewelry magnifier with LED and UV light helps provide a crystal-clear, sharp image. The UV light can also be used to recognize currency and identify jewelry. It requires 3 LR927 batteries (batteries included). Portable Design: Simply slide out the jewelry loupe to use and slide it back into its case when not in use. The case allows you to put the magnifier in your pocket or any other place while saving space. Multifunctional: The eye magnifier is ideal for stone and coin collectors, jewelers, hobbyists, for industrial use, and even as a great gift for children to explore the amazing world of small things. The eye loupe is made of optical magnifying glass and a full metal body, making it lighter, stronger, more compact, and more useful.