The program is run in silence. You only have to register yourself and the computer, install it and leave it in the system. It consumes very few resources and it can be extremely useful, so we recommend it.
If you happen to need its help, you only have to access Prey website and enable the alert. Then, you can choose whether to show a message on screen, take photos of the user or robber using the webcam remotely, and, of course, localize it in a map.
Prey is one of those programs we don't want to use, but which is very recommendable to have installed.