As a social creature, human are created with necessary tools for communicating to each other. However, there are some limitations about communication which we will never able to overcome if our technology is not as advanced as it is today. Without hand phone or another kind of telecommunicating device, we will found ourselves live in a stone age where there are not much things that we are able to do. There are also people who work using special kind of telecommunication device in order to keep the secrecy of their job.
One of the examples is police officers which use a special radio-like device on their vehicle to make them able to contact the headquarters while they are patrolling around the neighborhood. And there are some people who are curious enough to make them wanted to know about what the police officers are talking about. It is possible to be done by using live police scanner which is a device in which allow us to detect emergency signals and grab frequencies.
By using this device, we are able to listen to what the police officers talking about in their work hours. There are many jobs nowadays which need to use this device, as for example is reporters who need to always know whether there are crimes act to report. Therefore the reporters need to have this kind of device so that they will be able to instantly go to the crime scene and report it for exclusive news. But it is important to know that in some countries, using this kind of device is prohibited since it is violating others privacy.