Can be used for natural as well as artificial nails, for grinding, cutting, carving, polishing for all kinds of nail art.  With Adjustable speed up to 20,000rpm, make it easy to use, safe and non-injured hand. Shape and gently clean away uncomfortable hard skins, corns and hard glue. Input voltage: 110V ~ 220V AC Output voltage: 0-17V DC Power Max: 10W Output current: 0.8A Color: Purple Load speed: 16000-20000RPM Package including: 1 x Power Supply & Control 1 x Nail  Drill Pen 1 x Plastic Holder for Drill Pen 6 x Optional Bits 6 x Sanding Bands 1 x Operation Manual