What does the air conditioning MONO mean?

[OCarmen]

If there is a MONO button in the car, it means the air conditioning can control the temperature in different zones. When this button is turned on, all zones will blow air at the same temperature when adjusting the temperature. The function of the MONO button is to copy the driver's air conditioning settings to the passenger side with one press. Simply pressing it allows the passenger to enjoy the same air conditioning temperature, fan speed, and other settings as the driver. Precautions for using the air conditioning are as follows: 1. Using the air conditioning in summer: When the weather is hot and you need to cool down, press the AC button, adjust the temperature control knob to the blue section, and then turn on the fan switch. The indicator light will illuminate, and the car's air conditioning compressor will start working, blowing cold air from the vents. 2. Using the air conditioning in winter: When you need warm air in winter, adjust the temperature control knob to the red section and turn on the fan switch to blow warm air. There is no need to press the AC button. The car's heating system is not related to the compressor; the warm air is provided by the car's radiator, and the blower blows the heat into the cabin. This process consumes almost no energy, so there is no need to turn on the A/C button.