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Some shielded tool does not really shielded signal, and mobile phone jammer
to be true, it produces interference by superimposing the signal waveform, thus significantly weakening the signal to disappear.
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.
Exam in the use of cell phone signal jammer
is a very normal thing, it is not bound by law to use such a shielding signal.
A lot of people started talking about cell phone blocker
, as more and more mobile phones being used now is a social networking community.
Perhaps we can add a title to the content, laughing
is very focused on the meaning of the product, different designers in the selection and design of the time always strive to ensure quality.