Intelligent power-off protection: Rechargeable USB type-C rechargeable metal engraving pen with built-in overload protection chip. When the resistance is too high, it will automatically power-off protection to extend the service life of the jewelry. Engraving machine 3 levels of visible speed adjustment: This electric engraving pen is suitable for all materials, about 5000-18000r/min, and different speeds are used to engrave different materials. The engraving pen is and ergonomically designed to provide you with precise control and engraving. Low Noise: This cordless rotary tool works with very low noise, even if someone is sleeping, he or she will not feel noisy. Perfect for beginners and to use anytime, anywhere to make unique creations you love These portable and compact pens can be conveniently taken anywhere you want, allowing you to enjoy a relaxing handcrafted jewelry making time. It can work on metal, glass, ceramics, leather, wood, jewelry, stone or statues. Our metal engraving tools are easy to operate and can be used to create keychains, DIY necklaces or send gifts using our kits. Material: Metal colour: Black Package Contents: 1 x Engraving pen 1 x USB power cord 2 x Drill bit 3 x Saw blade 30 x Drill bit 1 x Polishing drill bit 1 x Connecting rod 5 x Template 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.