The same concept applies with a wireless home security system. You don’t have to be always present in your hoome to watch out for burglars. It can be set in two different modes: monitored and unmonitored. Based on experience, it is better
to opt for a monitored one, since when the system is disturbed, no annoying sound will be heard but an outside watcher will be informed of the incident. The unmonitored system, on the other hand, signals a loud alarm. Nobody is informed, thus suggests a swift
get away of the burglar.