On/Off Switch: Press briefly to turn on and press again to turn off.
Self-clean Button: Press briefly to start the self-clean mode, press and hold the button to enter
the deep self-clean mode.
Water Absorption Button: Press to start the water absorption mode, press again to switch to
auto mode.
Voice Prompt Button: Press briefly to turn on/off the voice prompt and adjust the volume. Press
and hold to switch the language.