Press the power button to turn on or off the purifier. How to Use Turning On/Off Switching Mode When the purifier is under working, tap the mode button to switch the mode. 20cm 20cm 10cm Placing the purifier in a suitable location Enabling or Disabling Child Lock Function For optimal performance, maintain the recommended distances between the purifier, and walls and other objects (refer to the illustration above). Tap and hold mode button for five seconds to enable or disable the child lock function. Note: It is recommended to keep doors and windows closed for a better purifying effect when using the purifier. 6 ff the