I'm not sure, it came pre-installed with the car. It warns me when I'm drifting between lanes without signaling first, it tells me if I'm speeding (no warning sound though), it indicates if I'm within a safe distance of the car ahead of me, and it triggers a very loud alarm if it thinks I'm about to hit someone or not keeping my distance.
It actually probably saved me from a minor accident on my first drive in my brand new car, getting it out of the dealership: It was raining heavily and visibility was crap, and I was a bit distracted finding all the controls and looking for the back window wipers (turns out there aren't any!). And I didn't notice the cars ahead of me stopped. The alarm went off and I hit the brakes (it was very low speed), and everything was fine.
It actually probably saved me from a minor accident on my first drive in my brand new car, getting it out of the dealership: It was raining heavily and visibility was crap, and I was a bit distracted finding all the controls and looking for the back window wipers (turns out there aren't any!). And I didn't notice the cars ahead of me stopped. The alarm went off and I hit the brakes (it was very low speed), and everything was fine.