What is the symbol for car external air circulation?

[SanAdriel]

Car external air circulation symbol is a button on the center console with an arrow pointing from outside the car to inside. External circulation means the blower draws air from outside the car and blows it into the cabin, providing fresh air. However, when the outside air quality is poor or when you need to quickly achieve ideal temperature inside the car, internal circulation should be used. The situation to use external circulation is when you've been using internal circulation for an extended period and it's inconvenient to open windows - you can periodically switch to external circulation to bring fresh air into the cabin. When there are many passengers in the car, using external circulation can maintain air freshness while preventing excessive humidity that might cause window fogging.