SpecificationProduct Namerechargeable USB engraving penColor: silver, goldSize: 11.8*1.8cmPower supply mode: USB chargingWorking rate: 10WRevolutions per minute: 5000-10000-18000RPMRated voltage: 3.7VDescriptionUSB rechargeable: Our engraving pen is USB rechargeable. With up to 30 minutes of cordless use after charging, it can meet most of your needs for DIY projects anywhere, anytime.Intelligent power-off protection: Rechargeable USB type-C rechargeable metal engraving pen with built-in overload protection chip, automatic power-off protection when the resistance is too high, extending the life of the engraver.Ergonomic design: The engraving tool is held like a pen with an ergonomic trefoil handle and fingertip controls. The soft rubber coated handle creates less fatigue during operation for comfortable and precise operation.3 STAGE ADJUSTABLE: With 3 levels of adjustable speed (5000-10000-18000RPM), you can adjust the working speed for different applications.Wide range of applications: This etching tool supports you to beautify and engrave on any material supplier, such as glass, wood, egg, plastic, jewelry, ceramic, leather, ring, etc. You can use this tool to engrave, sand, polish, drill and cutProduct list.Standard version.1*Engraving pen30*sanding head3*Stainless steel cutting blades (22mm, 25mm, 32mm)1*Handle pin2*drill bit1*USB data cableEngraving version.1*Engraving pen20*sanding head3*Stainless steel cutting blades (22mm, 25mm, 32mm)1*Handle pin16*Engraving Template1*USB data cable