Little secrets in the technological age

Mobile phone jammers are the most eye-catching. Imagine that you are sitting in a noisy cafe, and people around you are staring at the screen and making a "beep" message prompt sound. At this time, if you have a cellular jammer ( https://www.jammermfg.com/cell-phone-jammers.html ), with a light press, the people around you will be forced to "disconnect" from the outside world. Mobile phone jammers are often used in conference rooms, cinemas and other occasions where privacy protection or interference reduction is required.
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