Which button is the defogger in a car?

[OHarper]

There are two defogger buttons in a car: one for the front windshield defogger, with an icon of a fan shape containing three upward wavy lines; and another for the rear windshield defogger, with an icon of a rectangle containing three upward wavy lines. Some car models have letter prompts, while others only have icons without letters. The letter for the front windshield defogger is: FRONT; the letter for the rear windshield defogger is: REAR. To quickly defog, you can use the following method: set the vehicle to internal circulation, turn on the car's defogger button, turn on the car's cold air, which means turning on the AC button, and the fog can be eliminated in two or three seconds.