This product needs to be connected to a power source for use. Features: Comes with 23 accessories for different engraving and grinding needs Practical: This kit allows you to engrave in seconds to personalize or decorate almost any surface - metal, plastic, glass, ceramic, wood, leather, diamond, stone and more. It's perfect for DIY creations, crafting. Knob control on/off and stepless speed regulation: from 3,000 to 25,000 RPM revolutions per minute Lightweight and compact pen-like design: The surface of the body is designed from fine lines to deep grooves to provide a comfortable experience. Ergonomic grip for added comfort and stable control. Wide range of uses: suitable for carving nuclear carving/egg carving/bone carving/jade carving, cutting, polishing, engraving, milling, grinding, trimming, removing and drilling, grinding. Parameters: Clamping range: 0.5-3.2 Speed range: 3000-18000r/min can be falsely marked 3000-25000r/min Input voltage: 100-240V Output voltage: 12V Power: 13W Body size: 160x27mm Description: Mini model stepless speed regulation is easy to operate, small in size, user-friendly design, comfortable, wear-resistant, non-slip, small in power, suitable for micro-engraving operations Scope of application: small carving nuclear carving/egg carving/bone carving/jade carving auxiliary small grinding/polishing cutting/drilling/trimming/cleaning, etc. Product list: 26* accessories