Features Specification Features: Made of reliable materials of high density ABS environmentally friendly plastic, clearly acrylic optical lens, and sturdy metal. Designed with LED lamp for auxiliary lighting to get a more precise operation. Head-mounted magnifying glasses, freeing both hands to provides convenience for repairing. Acrylic optical lens with 25mm effective diameter, magnification clearly and comfortable visual. Apply for observing stamps, , jade ware, textile, or repairing industrial electronic devices, clocks and watches, etc. Specifications: Material: ABS+metal+acrylic optical lens Magnification: 20X Effective Diameter: 25mm Battery: 4 * 3V CR1620 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 * Magnifiying Glasses Package List 1 * Magnifiying Glasses