Made of ABS, durable, sturdy, anti-rust, suitable for long-term use. Compact size and portable, very convenient for you to store and place. It is a nice tool for manicurist or beginner, nail salon or personal home use. Can help you beautify nails, sanding and polishing the nails. Features -Material: ABS. -Size: About 15.00X2.00X2.00cm/5.89X0.79X0.79in. -Voltage: 3.7V -USB charging: 5V 1A -Lithium battery: 130mah -Charging Time：About 120 minutes. -Working Time: About 60 minutes. - Make it easier and safer to polish your nails. Effectively treat both delicate areas and rough . - Suitable for professionals, nail salons, nail art school or college, nail art artists, personal use, etc. - Gently sanding, easily remove rough, uneven nails. Simple to use and convenient to operate. - This nail drill pen is easy to change drill bits. Designed for nail polishing, removing, engraving, grinding and more. - USB charging, convenient to move, strong power, low noise. Suitable for natural nails and gel nails, bring more conveniences. Package list: 1 x electric nail drill machine 1 x USB cable 5 x grinding heads