Portable 4-band mobile signal interference device using method demonstration. Detailed introduction of various use considerations
How to legally block cell phone signals
Received questions
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I know what jamming devices do, but I want to know how to use them legally. It is said that it is forbidden in some countries
Second floor
Hello, Elsie
Cell phone jammer are now commonly used in exam rooms in Japan and China. European countries such as Britain and France are also trying to introduce such device. There is currently no U.S. policy against it.
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If you want to know the frequencies of your country, we can offer you some help:
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