What does the half-circle arrow on the remote car key mean?

[DiVivienne]

The half-circle arrow on the remote car key represents the engine start function. When outside the car, press the lock button once and then hold down the engine start button for more than three seconds to start the car. Typically, remote car keys have four buttons with the following functions: unlock, lock, open trunk, and locate car. Unlock button: Pressing the unlock button once will only open the driver's door; pressing it twice will unlock all four doors. Holding down the unlock button for several seconds will simultaneously open all four windows. On some models, the sunroof will also open. Lock button: Pressing it will lock all four doors. It also has a hidden feature: remote window closing. Trunk release button: The car key has a button to open the trunk. Holding down the trunk release button (or pressing it twice on some models) will automatically pop open the trunk. Locate car button: Some car keys have a red button with a horn symbol or the word "Panic"—this is the "locate car" button.