Feature: 1. Electric nail machine is suitable for most nail polishers and easy to unload, about 3 minutes. Multifunctional, can easily grind, polish and remove gel polish and cuticle of acrylic nails and natural nails 2. Built in rechargeable lithium battery, can be fully charged for about 1-2 hours, can work for up to 1-2 hours. 3 level battery display, you can see the remaining battery capacity and when to charge. Can work when charging the power bank and USB adapter 3. With 3 speed displays and 4 overload protection displays, the device will stop working if you use a lot of strength. Make this electric nail file easier and safer to smooth your nails 4. Professional high tech bearings and motors make the electric file low in heat, noise and vibration 5. This nail polisher is made of high quality metal, compact and lightweight, and designed to be easy to operate and carry. Small enough to fit in your travel bag or suitcase How to Use: Start Up Instructions: (see the user manual for details) 1. Press the power button once to enter the first level, the speed is about 5000rpm. 2. Press the power button again to enter the second level working state, the speed is about 10,000rpm. 3. Press the power button again to enter the third level working state, the speed is about 18,000rpm. 4. Press the power button again to enter the shutdown state. 5. WProfessional high tech bearings and motors make the electric file low in heat, noise and vibration. Electric nail machine is suitable for most nail polishers and easy to unload, about 3 minutes. Multifunctional, can easily grind, polish and remove gel polish and cuticle of acrylic nails and natural nails. With 3 speed displays and 4 overload protection displays, the device will stop working if you use a lot of strength. Make this electric nail file easier and safer to smooth your nails. This nail polisher is made of high quality metal, compact and lightweight, and designed to be easy to operate and carry. Small enough to fit in your travel bag or suitcase. Built in rechargeable lithium battery, can be fully charged for about 1-2 hours, can work for up to 1-2 hours. 3 level battery display, you can see the remaining battery capacity and when to charge. Can work when charging the power bank and USB adapter.