It sounds like the term cell phone jammer is illegal, but not all cell phone jammer are used illegally. Everything has two sides, and the emergence of jammers must have its theoretical basis. The low-end frequency of the channel scans to the high-end, which forms garbled interference to the signal reception of the mobile phone, and cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station, mainly manifesting that the mobile phone has no signal, search network, no service, and the like.In fact, most cell phone jamming devices are used for legitimate purposes.When the mobile phone works, the mobile phone and the base station are connected by radio waves in a certain frequency range, and the data and sound are transmitted at a certain baud rate and modulation mode, and the cell phone jammer works forward at a certain speed.

Because these trackers are very small, we are hard to find with the naked eye. In order to avoid being tracked and prevent some personal safety hazards and property damage, we need to use gps jammer,s to shield GPS tracking signals and protect our safety.Nowadays, with the rapid development of technology, cars have become our means of transportation. Almost all vehicles are equipped with GPS positioning systems. Some thieves, thieves and other criminals will install some small GPS trackers in the car to monitor our whereabouts in real time. 

The use of wifi jammer is becoming more and more common. The church uses wifi jammer to avoid the alarm of the mobile phone when people pray, affecting the sacredness and solemnity of the church; the cinema uses a WiFi jammer to prevent some people from making loud calls during the movie show. Some parents will install a WiFi jammer at home to block the WiFi network at home for a certain period of time, preventing children from transitioning to the WiFi network.Due to the large traffic volume in these places and the large number of users of public WiFi, this also leads to the slow speed of the WiFi network.