If the alarm is going off, you'll need to use one of the following:
* Your key fob: Press the unlock button.
* Your key: Some models might have a physical key slot that allows you to unlock the car and disarm the alarm (look near the driver's side door handle). This is less common on later model cars, but worth checking.
* Call a locksmith: If you've lost both your key and key fob, a locksmith specializing in automobiles can help you access and disarm your car.
Trying to bypass or disable the alarm without the proper key or tools is generally not recommended as it could damage the car's electrical system or even trigger further security measures.