Details Adjustable Speed and Easy to use - 0-30,000RPM with a speed control button, which makes this electric nail file easier and safer to polish your nails. Just need to connect the power cord with it to start working. It is professional for both home and salon use. Low Noise and Low Heat - This electro file is with a powerful yet quiet motor. Also, the smart heat dissipation can avoid overheating efficiently. (no more than 20 minutes of continuous use each time is recommended). Portable and Light - Compact and lightweight design make it easy to carry and portable to bring it out, you can do your nail art work anytime anywhere. Easy to Use - It is professional for both home and salon use. Just need to connect the power cord with it to start working.