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Why use a mobile phone signal jammer in the exam room?

In today's information age, with the development of science and technology, communication devices such as mobile phones have appeared, making people's lives more convenient. After experiencing constant upgrading, the functions...

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Reasons to use a full-band signal jammer

A full-band blocker is an ideal tool for banning cell phone use. In addition, the full-band signal jammer can also allow your child to grow up in a good environment....

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