Feature:1. CHARGING METHOD: Electric engraving pen uses USB lithium direct charging, a user friendly design with intimate experience design, easy and fast charging, and come with detachable battery for fast charging2. STRONG POWER: The cordless rotary tool supports 3 level speed adjustment of 9000, 14000, 20000RPM and has wide applicability to meet the needs of daily DIY grinding3. COOLING OUTLET: USB rechargeable mini engraver adopts the grid type outlet design to dissipate heat and ventilate, extending the service life4. LOW NOISE WORKING: This electric engraving machine work with very low noise, so there is no need to worry about disturbing the rest of the family.5. PORTABLE AND PRACTICAL: The main body of the etching tool is light and small. You can take with you. Super easy to use, the perfect choice for beginners or professionals, allowing you to customize everyday items to create one of a kind personalized accessories and giftsSpecification:Item Type: Electric Engraving PenMaterial: ABS, stainless steelBattery(supporting): 1 x 18650 Battery, Battery Capacity: 2000mAh(shipped with supporting battery)Battery(built In) : 1 x 18650 Battery, Battery Capacity: 2000mAh(shipped with built in battery)Three Speed Adjustment: 9000, 14000, 20000RPM.Package List:1 x Sanding Pen1 x Battery Charger1 x Battery3 x Connecting Rod5 x Grinding Wheel Head2 x Sanding Head3 x Sandpaper5 x Chuck2 x Wool Wheel1 x Cut Piece3 x Drill Bit1 x USB Cable2 x Storage Box