Car Key is an Android application that allows you to use your mobile device as a car key with beautiful effects and sounds. The app is developed by Real Dream and is available for free download. With this app, you can play pranks on your friends or use it with your kids instead of using the original car key.

The app includes several sounds for opening and closing the car, opening the trunk, and sounding the alarm. However, it's important to note that this app is not real and has no connection to reality. It's a fun prank app that can entertain and surprise your friends and family.