Feature: 1.Wide Application: It is widely used in carving porcelain, stone, glass, plastic, wood, bracelet, etc. Also, it can be used in polishing and trimming metal surfaces. 2.3-Speed Adjustment: There is a button to switch rotation speed among 5000-15000r/min, which adapt to different working condition. 3.Energy-Saving Design: This electric engraving pen is powered by USB cable, which is eco-friendly, energy-saving and convenient to use. 4.Heat Dissipation Design: Double-sided cooling holes help dissipate heat so as to prolong its service life and make work safer. 5.Portable Design: There is an ergonomic handle designed for comfortable gripping. You can use it anywhere anytime. .