Back when car alarms were first introduced, they came with a separate key fob that had remote controls for the alarm on it. You could lock your car and arm the alarm with the simple click of a button on the remote. These days, remotes have even more features, allowing you to open and close doors, open the trunk, and even start the car with the buttons. You don’t even need a separate key fob anymore. These remote buttons can often be integrated into the plastic head of the car key itself so you don’t need to carry a bulky key fob in addition to your key.