Cell
phone jammers are devices that create a temporary "dead
zone" to all cell phone traffic in their immediate
proximity. Jammers are typically used by the police
and military to control or disrupt communication
during hostage situations and bomb threats. Traditionally,
jammers were large antennas mounted on trailers that
had to be pulled behind a truck. They now come in
a variety of shapes and sizes including models that
are about the size of a cell phone.
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