Keyfobs for push-button cars usually have a back-up key to unlock the door, and a passive RFID chip that allows you to start the car by holding the keyfob close to the ignition button.
Yep, ganyan din instruction saken nung dealer.
To add pag nag prompt na lobat yung keyfob, palit battery na agad. May spare keyfob battery na din ako sa bag.