What does the REAR button mean?

[DelEva]

REAR button refers to the rear windshield defrosting and defogging function in a car. Here are some related details: 1. REAR button function: Normally, "rear" is the button to activate the rear air conditioning, which is also the rear window defroster switch. When activated, it can remove fog from the rear windshield. Some car models may have a "rear-temp" button to adjust the rear temperature, while a REAR button with a lock symbol is used to lock the rear air conditioning. Pressing it will lock the rear air conditioning. 2. Working principle: The rear windshield defogging works by heating the copper wires embedded in the glass, which evaporates the moisture in the fog, thereby eliminating it. When the rear windshield fogs up or there is heavy snow on the outside, pressing this button activates the horizontal heating wires in the rear windshield to heat up, removing fog and snow from the glass to ensure driving safety.