What are the functions of the three buttons on the Yaris dashboard?

[McElla]

The functions of the three buttons on the Yaris dashboard: 1. Hazard warning light (commonly known as double flashing light): Its function is to warn other vehicles around to prevent rear-end collisions. 2. Internal/external circulation: The difference between internal and external circulation is that the air in internal circulation is always provided by the inside of the car, while external circulation allows outside air to enter and replace the original air inside the car. During traffic jams, in tunnels, or when the outside air quality does not meet standards, internal circulation should be prioritized. On highways, external circulation should be switched every hour or so to replace the air inside and outside the car to prevent hypoxia. 3. Temperature zone synchronization: The function of temperature zone synchronization is that only the temperature of the driver's position needs to be changed, and the other temperature zones will follow the same change. After turning off this temperature zone synchronization, each zone can be set individually to meet the needs of passengers in different positions.