The mobile signal jammer is a circuit device that is generally used to blockade the communication of the mobile phone signals within a certain entire range and any restricted nearby workstations like Petrol Pumps. A mobile signal jammer is such kinds of device which have different kinds of frequencies depending on the different types of models by which you could operate the suitable frequency signals in consider of you have need. To avoid disturbance in Petrol Pumps it is best solution rather than display board of " Switch off Mobile Phones "
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