How do I turn on the water ionisation function of the Xiaomi Water Ionic Hair Dryer H500?

Xiaomi Water Ionic Hair Dryer H500 works in different air temperature modes and air volume modes to blow air containing water ions, so there is no need to turn it on manually. In other words, water ions are generated regardless of the environment when the hair dryer is switched on and in use.
Note: Dual Water Ion Hair Care means that Xiaomi Water Ionic Hair Dryer H500 supports dual water ion emitters for better hair care compared to other single water ion emitters.