Using this Ally nail drill machine is a breeze. First, make sure it's fully charged. Plug it in and let it charge for 3 hours. Once it's charged, turn it on and adjust the speed according to your needs. You can reach up to 30,000 RPM. When using it on nails, be gentle and move the drill in a smooth motion. As for maintenance, keep it clean. After each use, wipe it with a soft cloth. Store it in a dry place. Remember, this machine is made in Korea, so handle it with care to keep it working well for a long time.