Which button is used to heat the rearview mirror?

The rearview mirror heating is a combination of three curved upward arrows and a rectangular button. The rearview mirror heating function means that when the car is driving in rain, snow, or fog, the rearview mirror can be heated through the lens embedded behind the lens. Electric heating wire heats to ensure the lens surface is clear. The function of the rearview mirror heating is to heat the lenses to defog and defrost them, keeping the rearview mirrors clear and ensuring the driver's driving safety. The principle of rearview mirror heating is: install electric heating sheets or electric heating films in the lenses of the rearview mirrors on both sides. When encountering rain or snow, turn on the rearview mirror electric heating function, and the electric heating sheets will quickly heat to 35 to 35°C in a few minutes. 60 degrees Celsius, thus heating the lens, defogging and defrosting it.