How to get my students to quiet? They play phone in class. Can I use the GSM jammer.
Cell phone signal jammer subject to legal restrictions in some countries, as security considerations, the illegal use of cell phone signal blocker might have 10 million dollars in penalties.
Knowledge: GPS signal is referred to U.S. commercial GPS. The GPS jammer is such a signal shielding devices, can be used in vehicle tracking and so on.
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