In Canada, we are always looking for quality of life, so cell phone jammer in everyday life to always be able to use.
What mobile phone jammer in the examination room is the real meaning? That is to make cheating candidates signal disappears, so that everyone fair exam.
Knowledge: the signal is actually encrypted transmission of electromagnetic waves, the signal peaks and troughs on behalf of 1,0. cell phone jammer play a superposition of waves, resulting in the shielding effect.
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