1?�� USB Charge: These wireless engraving tools equipped with Lithium battery and rechargeable by USB type?C interface. Cordless using will lasts up to 30?60 minutes after fully charged, Easy to help you finish better engraved craft. 2?�� Portable and Flexible: The body of our etcher engraver tool is small and lightweigh, you can carry it anywhere and allow you enjoy relaxing hand drill jewelry making time. This portable engraving tool made of durable and lightweight aluminum; the ergonomic design of the pen body provides you with precise fingertip control. 3?�� Easy to Use: One button to turn on or turn off the engraving pen, also this bottom work for flexibly adjust the speed according to the needs of carving. and our cordless engraving pen is equipped with a built-in overload protection chip. When the load resistance is too high, it will automatically power off to protect it, and prolong the service life of the jewelry engraving machine. 4?�� Wide Applications: This electric engraver tool supports you to beautify and engrave in any material supplier, such as glass, wood, eggs, plastic, jewelry, ceramics, leather, metal and etc. You can use this tool for engraving, grinding, polishing, drilling, and cutting on metal, glass, jewelry and other materials. 5?�� Low Noise: The sound of this cordless rotary tool is very low when working, no need to worry about it will affect the family's rest. It will be great for beginners and professionals to use at anytime, anywhere to make unique creations.