Feature: 1. High Working Safety: The carving tool is rechargeable and comes with a USB cable. The micro engraving pen is equipped with a safety protection circuit board and an intelligent overload protection chip. When the working resistance is too high, the power will be automatically cut off to prevent damage to the pen, making it very safe to use. 2. High Concentricity: The integrated design of built in accuracy bearings and extended shafts can effectively improve the concentricity of grinding rotation. 3. Accurate and Stable: Equipped with accurate and replaceable copper clamps, the clamping is firm and stable, without tilting, making it easy to achieve precise drilling and carving. 4. Great Performance: With a power of up to 10W during operation, it can adjust three levels of speed within the range of 10000‑20000RPM, suitable for different materials. The 20000 RPM motor provides better control and handling. Lightweight aluminum alloy frame and ergonomic grip. 5. Low Noise and Portable: This electric engraving machine has very low working noise, so there is no need to worry about disturbing your family. The main body of the etching tool is light and small. You can carry it with you. Super user friendly, the perfect choice for beginners or professionals, allowing you to customize daily necessities, create unique accessories and gifts. Specification: Item Type: Electric Engraving Pen Material: Aluminum Alloy Battery: 1 x lithium battery with 380mAh capacity, shipped with built in battery. Speed: 10000rpm low speed, 15000rpm medium speed, 20000rpm high speed. Power: 10W Voltage: 3.7V Charging Voltage: 5V 2A Fixture: Approx. 2.35mm / 0.09in Clamp Depth: Approx. 25mm / 0.98in. Package List: 1 x Electric Engraving Pen11 x Engraving Bit1 x User Manual1 x Charging Cable