How to Use: 1.Put the batteries in the battery case and connect with the engraving pen. 2.Push the red button on the engraving pen, and then it can start to work. Specifications: Color: Black Material: Plastic #43; Diamond Tip Battery Operated: Powered by 4 * AA Batteries(Not included) Application: Metal/Wood/Glass/Stone/Ceramics/Hard Material Surface Item Size: 16.0 * 2.3cm / 6.3 * 0.9in Item Weight: 41g / 1.4oz Package Size: 11.7 * 19.8 * 2.8cm / 4.6 * 7.8 * 1.1in Package Weight: 126g / 4.4oz Notes: Please allow 1-3mm error due to manual measurement. Do not touch the diamond tip when the engraving pen is working. Package List: 1 * Engraving Pen 1 * Battery Case Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store