Some shielded tool does not really shielded signal, and mobile phone jammer to be true, it produces interference by superimposing the signal waveform, thus significantly weakening the signal to disappear.
Cell phone signal blocker, I want to say I really can not stand close, so I did it my way normal use mobile devices. Who is so annoying. Using a cell phone blocker should be stationary. I was a student, I did not test the phone when you let me how to find information.
Cell phone jammer in the use of very simple, only need to install the corresponding antenna, turn on the switch can shield mobile phone signals corresponding to it.
Cell phone jammer is mainly equipment requires shielded 2G 3G 4G signal, it acts as a technical means, which has been present in the current society, many people use such devices.
We have regular contact with mobile phone jammer in the army, in order to prevent the phone bomb attacks, it is necessary.