Adjusting the volume
When the button is pressed, the status display LED lights up to match the current volume.
The status display LED blinks each time the button is pressed, and the number of flashing LEDs increases or decreases to match the volume.
When the volume reaches the maximum or minimum, the status display LED blinks three times.
When the power is turned on, the unit starts with the volume level that was set before being placed on standby. However, if the volume was previously set to high, it starts with the volume setting lowered to a certain level.