What do the three buttons on a car key represent?

[AbelLee]

Generally, they represent lock, alarm, and unlock, or lock, trunk, and unlock. Here are some related additional details: 1. Find car: Some car models have a fourth button on the key, which is a red button added to the three buttons. Some red buttons may have a horn symbol or the word "Panic" printed on them. This button is technically called the "car finder key." 2. Automatic trunk opening: The car key has a button to open the trunk. Simply press the trunk unlock button (some cars require pressing it twice), and the trunk will automatically pop open. 3. Close windows after turning off the engine: Sometimes, you may forget to close the windows after parking and turning off the engine. By holding down this button, the windows can be closed immediately.