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How to get my students to quiet? They play phone in class. Can I use the GSM jammer.
Here are some knowledge we need to learn, you can look at this site:cell phone signal blocker
RF jammer make car remote failure. The GPS jammer allow others to find the location of cars.
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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