1. Low noise and low vibration and low heat: max 20000rpm. Speed ​​adjustable. Advanced and reverse work. The plastic body takes an effective heat distribution. Silent, smooth and comfortable for long -term work. If any, consult the seller to solve the problem. Low noise, low heat and vibration for smooth and long -term work 2. Adjustable Speed ​​and : With a speed control button that makes this electric nail file easier and r to polish your nails. It is professional for the use of both home and living room. This electro file is a strong but quiet engine. In addition, intelligent heat distribution can prevent efficient overheating. The speed can be adjusted from 0-20,000 RPM. Light and compact design is easy to carry when traveling. Wedding/Halloween/Christmas/Parties/Costume Ball/etc. Perfect for. Valentine's Day gifts for him or for him.