A smart car key, also known as a "smart key", is an electronic key used to unlock and start a car without using a traditional physical key. Instead of inserting the key into the ignition switch, the user can simply have the key with them and press a button to start the car. ​

 

Although smart car keys offer a high level of convenience, they can be expensive to replace if lost or damaged. It is therefore important to take care of the key and protect it from damage or loss.