Buy portable cell phones jammers and powerful desktop jammers in our online store Jammer-Store.com. Frequencies jammer works with a radio signal, and if the detectors simply register a signal, the jammers jam it (for example, a wi-fi signal or GLONASS). For these reasons, a jammer for mobile devices is the best defense against spyware. The jammer of mobile phones is the best protection against eavesdropping and encroachment on business and personal life today.