In recent years, jammers have grown far beyond expectations, with more than 20 ships operating in the Black Sea subjected to so-called massive spoofing attacks between June 22 and 24, 2017. The ships reported that their GPS navigation incorrectly located them at an airport several kilometers offshore.

A ship sent the following message to the US Coast Guard Navigation Center:
"Near the coast of Novorossiysk, Russia, GPS equipment has been unable to acquire GPS signals intermittently. Now it shows HDOP 0.8 accuracy within 100m, but the position given is actually 25 nautical miles."
Information provided by the captain, including photos of his navigation displays and paper charts, later confirmed that the disturbance was indeed an external event and not a single GPS device.

The full-band signal jammer customizes a spherical shielding space according to the same frequency band of transmission, and automatically forms a shielding magnetic field within the specified range to make mobile phones in the space lose their signals. When the 5G full-frequency wifi blocker is in the working state, it can disable the function of the mobile phone to send and receive signals within the specified range, and cannot dial out or dial in, so as to achieve the purpose of mandatory disabling.

Many people don't know the difference between Bluetooth, Wi-Fi, and mobile data. They are all wireless communication technologies. In fact, the main difference between the two is the frequency band. In mobile communication technology, 2G mainly works in the 900-1700MHz frequency band, 3G mainly works in the 1900-2100MHz frequency band, 4G works in the 2300-2500MHz frequency band, and 5G works in the 3400-3600MHz frequency band. Bluetooth and WiFi operate on 2.4GHz.

In daily life, there are many places, such as examination rooms, conferences, prison cells and other areas, where it is very unsuitable to use electronic equipment and communication equipment at will. Just use a wifi jammer. In special places, mobile phone digital signals and Wi-Fi are blocked. At this time, when you turn on the mobile phone and there is no mobile phone signal and network data signal, you will find that the mobile phone has no signal. It's a great realization. The purpose of blocking staff's use of mobile phone signals in special places. Indeed, inventions and creations on mobile phones have brought people closer and closer, bringing great convenience to people's lives. However, because there are many national cultures on the mobile phone, it is inevitable to encounter many difficulties. Issues such as key data leakage and exam cheating occur. Therefore, at this time, we have developed a mobile phone signal jammer to solve the above problems.