Which is on, off or on?

[StCora]

ON means on, and OFF means off. ON and OFF are very common buttons, not only in cars, but also in many daily-use appliances. Here is some relevant information: 1. SEL and OK buttons: The SEL button is a menu selection confirmation button, usually found on the multifunction steering wheel. The OK button has the same function as the SEL button, but some cars use SEL while others use OK. 2. A/C button: The A/C button is the compressor switch, the full name is Air-Condition, which is the air conditioning cooling switch, because the car air conditioning does not use the compressor when heating. 3. VOL+/- buttons: The VOL+/- buttons are used to adjust the volume up and down. VOL is the abbreviation of the word "volume", which means volume and can adjust the volume of the car audio.