See also:

Stereo indicator
The stereo indicator “ST” will illuminate when an FM stereo broadcast is received. ...

MUTE button (if equipped)
Press this button if you wish to immediately cut the volume to zero. The audio display will show “MUTE”. If you press the button again, the original sound volume will return and “MUTE” turns off. ...

Fan speed control button
The fan speed control button has 6 different fan speed positions. The fan speed is shown by the display. ...