Maybe you feel strange about this problem, but in fact there are already many sounds and shadows around you!
Have you ever found that there is no signal when using your mobile phone in some public places? If this happens, your phone may have been blocked by a cell phone jammer, which means the phone will not be able to make calls or send text messages. All devices in the area that use network signals will malfunction.
Mobile phone jammers are designed to prevent security issues such as information leakage. They can effectively block the connection between mobile phones and base stations. If a cell phone jammer is used in a certain area, all electronic devices in that area will be unusable.
Nowadays, maybe you know very little about mobile phone data signal jamming equipment!
Typically, cell phone jammers are used in areas where cell phones are not allowed. In some public places such as movie theaters, public libraries, theaters, Catholic churches, etc., people are tired of the sudden arrival of their mobile phones. When going to special places such as hospitals and gas stations, people are worried about the uncertain risks of using mobile phones. Cell phone jammers are widely used in people's daily lives!
There are various mobile phone jammer devices, such as portable server signal blockers, which have built-in rechargeable batteries, so they can be sent anywhere at any time: such as high-power mobile phone jammers, which need to be connected to a DC regulated power supply, but It sees a large interference range, from 10-200 meters: for example, a built-in mobile phone jammer, you will never know it is a mobile phone jammer, because it has no wireless antenna, it is just like an ordinary device.