1. A device comprising: an antenna, a receiver, configured, in combination with said antenna, to receive at least one emission of an electromagnetic energy, said at least one emission being given off by at least one electrical device; at least one processor; wherein said device is configured to monitor the at least one electrical device by measuring and processing a change or changes in a signature of said at least one electromagnetic emission; and wherein said device is configured to predict degradation of a component of the at least one electrical device based on said signature change or changes.