Features: USB pen for wireless engraving: engraving pen can be charged via the USB port. Fast charging time, fully charged and runs for over 1 hour in 60 minutes, easily engraves all kinds of crafts. Easy to use and especially suitable for beginners. Three speed levels: electric engraving pen works with a power of up to 10W and has 3 positions with speeds of 10000-15000-20000 revolutions perminute, which can be used for different occasions at different speeds. The engraving pen has a power indicator and anoverload indicator, so you can see how the pen is used in real time. Multi-purpose use: multifunctional engraving pen engraving tool set can be used as an electric engraving device or as a small rotary tool that allows you to personalise or decorate almost any surfaces such as metal, plastic, glass, ceramic, wood, leatheretc. in seconds. It can not only be used for engraving and grinding, grinding and drilling, but also for polishing manicure and pedicure, removing gels and cuticles. Specifications: Item：Electric Engraving Pen Material: Alloy Collet Depth：approx 25mm Power: 10W Voltage:3.7V Battery： 380mAh Input: 5V2A Speeds ：10000-15000-20000R Engraving Pen Length：approx 15cm/5.9in Package Includes: 1PC Multi-size Grinding Head (lining depth: 2.35 mm). 1PC USB type C Charging Cable. 1PC Packaging Box 1PC Set of Sanding Belts note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!