Specifications: Type: engraving pen Speed adjustment: three-gear adjustable Speed: 5000-15000r/min Power supply: USB charging Voltage: 3.6V Color: black blue Size: 18 * 6 * 4.5cm Battery capacity: 700mah Charging time: 2-3h Full use time: about 1 hour Features: 1. Comfortable grip The well-designed carving pen allows you to use it as a pencil to obtain comfortable feeling, better control and accurate carving. 2. Reliable quality made of high-strength metal and selected electronic components, with wear resistance, wear resistance and long life. 3. High efficiency The speed of the engraving pen is up to 5000-15000r/min, the engraving effect is efficient, and the three levels are adjustable, making engraving easier. 4. Rechargeable engraving pen The electric engraving pen is powered by lithium battery with 700mah battery capacity, which can be charged and used. No more disposable batteries! 5. Wide range of applications: pen can be used to carve metal, ceramics, wood, pebbles, plastics, etc., suitable for DIY projects or process purposes. Package includes: 1 * Engraving pen 1 * USB charging cable 1 * Instructions 1/12/47 * Grinding head accessories