Batteries: 3*LR1130 (included). Voltage: 1.5V. Lens diameter: 25 mm. Magnification: 40x< br> 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 has powerful magnification, allowing you to take a closer look at the smallest details. The magnifying glass offers distortion-free magnification. It is ideal for the watchmaking industry, for examining small objects, reading small texts or examining gemstones and diamonds. Product with high-quality lighting: Even in the dark, the jewelry magnifier with LED and UV light can help you 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 magnifier to use and slide it back into the case when not in use. The case allows you to put the magnifier in your pocket or any other place while saving space. Multi-function: The eye magnifier is ideal for stone and coin collectors, jewelers, hobbyists, for industrial use and also as a great gift for children to explore the wonderful world of small things. The eye magnifier is made of optical magnifying glass and full metal body, which makes it lighter, stronger, more compact and more useful.