1. Remove the grinding head.

2. Remove the battery cover and install the battery according to the position of the positive and negative polarity of the battery.  

The switch can be used normally when the switch is set to "on", and the  switch will be turned off at the "off" position.

3. If the adapter  use power supply, please select (5v1.5a) to connect the USB cable , then the switch can be used normally when the switch is set to "on", and the switch will be turned off at the "off" position.

4. After use, remove the grinding head  to clean, rotate the upper cover anticlockwise to remove it, and take out the filter cotton to clean.