You can control one or more frequencies of the jammer

In today’s world, cell phone signals are ubiquitous and present in all kinds of environments around us. When a cell phone is not in use, other electronic devices have little effect on it. When there is no active cell phone, there is no data communication between the cell phone and the base station, which generates a relatively stable electromagnetic field. This static field has little effect on electronic devices. However, when the cell phone is in use, the data communication with the base station generates a sudden alternating signal, which generates a dynamic electromagnetic field. These dynamic signals can disrupt the normal operation of electronic devices. This is why cell phone jammers in places such as gas stations are important.

College entrance examinations are of great significance in this city. To prevent cheating in the exams, cell phone jammers are installed in the examination halls. These jammers interfere with 3G cellular signals because there have been reported incidents of fraudulent activities using 3G mobile phones, including the civil service examinations that were highlighted in the news. Therefore, signal jammers are used to resist such fraudulent activities during the exams. Some signal jammers even have the function of blocking 4G signals, helping to combat high-tech cheating in various local examinations such as the college entrance examination.

The potential harm of cell phone signals to the human body is worrying, but it should be noted that the electromagnetic signals emitted by cell phone signal jammers are very weak, and test data shows that the signal strength is harmless to the human body. In addition, the mobile phone signal jammer only blocks the forward signal of the mobile phone, making it impossible for the mobile phone to connect to the base station, and does not harm the mobile phone itself. Popular GPS jammers and WIFI jammers in Europe and America.

The effective range of the mobile phone signal jammer is generally about 30-40 meters indoors, and in open areas outdoors, the coverage range can reach hundreds of meters. The actual signal shielding range depends on factors such as the installation location and general environmental conditions. These factors must be considered when using the signal jammer to avoid blind spots and affect the shielding effect.

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