Effect - The "invisible warrior" that makes the signal disappear

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The most well-known member of the jammer family is the mobile phone jammer. Its function is simple: it makes your mobile phone lose connection, unable to make calls, send text messages, or even go online. In some special occasions, such as during exams or important meetings, portable jammer ( https://www.thejammerblocker.com/cell-phone-jammer-blocker-for-gsm-5g/ ) is particularly important! Imagine if everyone can use their mobile phones unimpeded during the exam, the scene is simply unimaginable, right?