cell phone reception blocker

Imagine if you need to go to a concert hall where you listen to a concert, and you like to always ring your phone ringing next to you, or call out loudly, this will make you very angry, I think so. This is why the concert hall is equipped with mobile phone jammers. On the one hand, you can prevent ringtones from interfering with music performers, on the other hand, you can ensure that the audience has a better experience. If you are enjoying a great concert or a good movie, there is a telephone ringing theater nearby, everyone will be angry. If you think it shouldn't happen in such a place, you can use a cell phone jammer.

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