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This signal is not able to communicate and access the Internet, so the phone will not work properly.The cell phone signal blocker can only block the cell phone signal without affecting other electronic devices.After the mobile phone signal shielding device is plugged in, it will send the same frequency as the downlink frequency of the base station, which will interfere with the mobile phone to receive the normal frequency sent by the base station, so that the mobile phone can not receive the signal of the base station, but receives the signal from the shielding device.

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The GPS signal located in the interval is intercepted, so that it cannot be Position tracking, some high-power GPS signal jammers can block mobile phones and even WiFi signals, generally used in the home or device in the car, as those mini gps jammer can be carried around, in the pocket, and the price is very cheap. The GPS jammer is a signal interception device that specifically blocks GPS. When the equipment starts to work, it can form a shielding interval within a certain range, that is, a "protected area". In military terms, GPS satellite signals determine the military lifeline of a country.

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If there are 10 classrooms in the past, install 3 in the aisle. Most external wifi signal shields are omnidirectional antennas that are shielded 360 degrees from the center of the machine. Wifi signal jamming devices are mainly used in examination rooms, prisons, gas stations, mobile phone bombs, oil depots, detention centers, interrogation rooms, special security and confidential sites. Different types of mobile phone shielding devices have different power and interference ranges. When the magnetic field is strong and weak, when the magnetic field is weak, install one wifi signal jammer in 2.5 classrooms.

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