Jammers
Killer, Jammer ... disturbatore, these are only a few names for those devices which began to be used. It is possible currently to buy it at internet. Current mobile phone is operating with their using as if the signal is lost. They are used in places, where phone calling is not recommended (meeting rooms, courts, hospitals, prisons, libraries of universities ... etc. ).
Their using in the Czech Republic is forbidden !!!
They are used by pyrotechnists to prevent blowing the charge by help of phones.
Through their activation the GSM systems, transferring of GPS, GPRS, GSM pagers and entire transfers of signals in these networks are disabled. Range at those devices is 5 – 10 meters for the models of the lowest performance. At the models of the highest performance it is to cca 100 meters.
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