SincereetaliFeatures: Made of reliable environmentally friendly high-density ABS plastic materials, clearly acrylic optical lens and sturdy metal. Designed with LED lamp for auxiliary lighting to achieve more precise operation. Head-mounted magnifying glasses, freeing both hands for easy repair. 25mm effective diameter acrylic optical lens, clear magnification and comfortable visual. Apply to observe stamps, coins, jade articles, textiles or repair industrial electronics, clocks and watches, etc. Specifications: Material: ABS + metal + acrylic optical lens Magnification: 20X Effective diameter: 25mm Battery: 2 * 3V CR2025 button battery Item size: 150 * 48 * 45mm / 5.91 * 1.89 * 1.77in Item weight: 78g / 2.75oz Package weight: 85g / 3.01oz Package size: 17 * 7 * 6cm / 6.69 * 2.76 * 2.36in Packing list: 1 * Magnifying Glass