Intelligent Power-Off Protection: Rechargeable USB type-C charging metal engraver pen, there is a built-in overload protection chip, when the resistance is too high, it automatically power off to protect it, and prolong the service life of the jewelry engraving machine 3 LEVAL VISIBLE SPEED ADJUST: This electric engraving pen for all material is about 5000-18000r/min, and different speeds are used to engrave different materials. The engraving pen is and ergonomically designed to give you precise control and engraving. Low Noise: The sound of this cordless rotary tool is very low when working, even if someone is sleeping, he or she not feel very noisy. Great for beginners and professionals to use anytime, anywhere to make unique creations that you like ENGRAVED ART NOW: these portable and compact pen are convience to take anywhere you want and allow you enjoy relaxing hand drill jewelry making time. It can work on metal, glass, ceramic, leather, wood, jewelry, stone or statue. FOR BEGINNER: Our metal engraver tools are easy to operate, Create a keychain, DIY a necklace or send gift with our kits. Note: The color of accessories is random and no specified colors are accepted. Material: Metal colour: grey Package Contents: 1 x Electric Engraving Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.