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: BlackMaterial: Plastic 43; Diamond TipBattery Operated: Powered by 4 x AA Batteries(Not included)Application: Metal/Wood/Glass/Stone/Ceramics/Hard Material SurfaceItem Size: 16.0 x 2.3cm / 6.3 x 0.9inItem Weight: 41g / 1.4ozPackage Size: 11.7 x 19.8 x 2.8cm / 4.6 x 7.8 x 1.1inPackage Weight: 126g / 4.4ozNotes:Please allow 1-3mm error due to manual measurement.Do not touch the diamond tip when the engraving pen is working.Package List:1 x Engraving Pen1 x 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-Minnanxin