3 Level Speed Adjustable: The cordless electric engraving pen's Rotational to 18000r/min, and buile-in 3 different speeds (Short press) to engrave different materials. The engraving pen is and ergonomically designed to give you precise control and engraving. Low Noise, Perfect for Beginners: The cordless rotary engraving tool is very and portable during the short journey. The working sound is very low, even quiet , it never make the interrupt even the others in a room. (The Smart Power-Off Protection protect the beginners for safe use. We suggest this tool for adults only.) Smart Power-Off Protection & Pure Metalic Hand Feeling: Built-in overload protection chip, when the resistance is too high, it automatically power off to prevent machine damage and extend the lifespan. Made of solid metal, the outer metal wrap gives you a better metallic touch instead of a cheap plastic texture, and it never discolor or peel off during the use. What you get: This engraving machine kit comes with: 1 X Engraving pen, 1 X USB Type-c charging cable, 1 X Polish bit, 2 X Drill bits, 3 X Saw bits & 1 connecting stick, 30 X Engraving bits, 5 X Stencils. All these bits are enough to work on engraving, carving, sanding, polishing, , routing, grinding, drilling, cutting, etc. Electric Engraving Pen with 37 Bits, USB Rechargeable Cordless Engraving Machine, Portable DIY Rotary Engraver for Jewelry Wood Glass Stone Carving, Weight: 0.47619848592 Pounds, Manufacturer: tiyao