The Mitsubishi ASX comes with keyless entry and factory immobiliser as a standard along with a very basic alarm system.
When I say basic, I mean basic! The factory alarm lacks any internal movement sensors so only offers door, boot, and bonnet protection.
Once triggered it has a 30-second delay before the alarm sounds the horn.
If you are looking to improve on the factory alarm, then my recommendation is the Cobra AK4615 CAN-BUS upgrade alarm.
This video shows it in action:
Here are some photos of what the alarm looks like installed:
Here is how they look when back in the car: