NEOS II の使用中に振動が弱い場合はどうすればよいですか？

1. Ensure the brush head is properly attached. The brush head should be mounted on the motor shaft with less than a 1mm gap from the top of the body. It may require some force to secure it.

2. Note that NEOS II has three intensity modes. If the vibration feels weak, try selecting a higher intensity mode for stronger vibrations.