USB Charging: These cordless engraving tools are equipped with lithium batteries and can be charged via a USB Type-C interface. After a full charge, wireless use can last up to 30-60 minutes, easily helping you complete a better engraving process. Portable and Flexible: The body of our etching engraving machine is small and lightweight, you can carry it with you, allowing you to enjoy a relaxing hand drill jewelry making time. This portable engraving tool is made of durable and lightweight aluminum; the ergonomic design of the pen body provides you with precise fingertip control. Easy to Use: One click to turn the engraving pen on or off, this bottom can also flexibly adjust the speed according to engraving needs. Our cordless engraving pen is equipped with a built-in overload protection chip. When the load resistance is too high, it will automatically shut down to protect it and extend the life of the jewelry engraving machine. Wide Range of Applications: This electric engraving tool supports you to beautify and engrave on any material suppliers, such as glass, wood, eggs, plastic, jewelry, ceramics, leather, metal, etc. You can use this tool to engrave, grind, polish, drill, and cut on metal, glass, jewelry, and other materials. Low Noise: This cordless rotary tool has very low noise when working, no need to worry about affecting the rest of your family. It is perfect for beginners and professionals to use it anytime and anywhere to create unique works.