What does the Honda rear button mean?

[OscarLynn]

The rear button on a Honda car refers to the rear windshield defogger switch. Pressing it activates the defogging function for the rear windshield. Typically, the rear defogger automatically turns off after about ten minutes to protect the heating resistor wires. The principle of the rear windshield defogging device involves embedding copper wires into the rear windshield. When there is moisture or fog on the rear windshield, an electric current heats these copper wires, warming the glass and clearing the fog. On the rear windshield of a car, you can see thin copper wires, which are the heating elements. These metal wires are only about 0.02 to 0.04 millimeters thick. Approximately 400 to 500 tungsten heating wires are spaced 2-3 millimeters apart and embedded in a thin PVB plastic film, which is then laminated between the glass layers without obstructing the view.