It is, yeah, you tell them the registration number, the number from the number plate.

And then you tell them, you do something in your phone, you press a button, and then the police can see it.

And then they look on the map and see where it is, and they send a police car to go and check it.

And if somebody's in it, they'll arrest them, the naughty people.

And if it's empty.

But the thing is, not all cars have trackers. Some have trackers, some don't.

So what they do now, when they steal the car, they don't just take it to, they don't just take it somewhere to sell it.

They take it and park it somewhere quiet.

And then they leave it for a couple of days to wait and see.

If it's got a tracker, then probably the owner or the police would come and get it back.

And if it hasn't, then a couple of days, it's still there.

Then they'll go and take it back.

They can't sell it.