Batteries: 3 x LR1130 (included). Voltage: 1.5V. Lens diameter: 25 mm. Magnification: 40 times. Weight: 158 g. Suitable for: Industrial purposes, medical science, coins and stamps, geography, PCB and printing, home and office. Package includes: 1 x magnifying glass, 3 x battery Powerful 40X Magnification: This LED jeweler's loupe boasts impressive power, allowing you to get an extremely close view of the tiniest details. It provides distortion-free magnification, making it ideal for watch repair, inspecting small objects, reading fine print, or examining gemstones and diamonds. High-Quality Illumination: Even in the dark, the Delixike jewelry magnifier with LED and LV lights provides a crystal-clear image, ensuring a sharp and clean view every time. The light can also be used for currency detection and jewelry identification. It requires 3 batteries (batteries included). Portable Design: Simply pull out the jewelry magnifier to use and put it back in its case when not in use. The storage box helps you easily slip your jeweler's magnifying glasses into your pocket or anywhere else, saving space. Widely Used: This eye loupe is excellent for stone collectors, coin collectors, jewelers, hobbyists, industrial purposes, and also makes a fantastic gift for children to explore the amazing little world. The entire magnifying glass uses an optical magnifying glass lens and a full metal shell, making this magnifying lens and light more robust, compact, and useful.