maybe you need to get convoy protection jammer

After on site survey of the building structure, terrain and local signal tower direction, power, channel and have a large number of communication microwave technology, sophisticated business, high quality, strong sense of responsibility, very serious requirements for details, and construction experience Abundant employees can meet the construction needs of cell phone jammer projects, and solve and deal with various difficult problems on the spot in time. Complete and abundant professional technical information, professional test and analysis instruments, solve practical problems for prison customers, and provide customers with the best solutions.

In the technological age, mobile phones have been upgraded from generation to generation, their functions are becoming more and more perfect, and more and more intelligent. As a result, the popularity of smart phones has appeared. More and more people cannot use mobile phones reasonably, which leads to a series of mobile phone problems. In this case, GSM, which is the frequency band of the basic communication signal, is susceptible to interference. The GSM jammer on the market is a professional device that interferes with mobile communications.

In order to prohibit students from using mobile phones, schools usually use Convoy Protection Jammer to cheat. For safety and management, prisons can also use powerful jammers to prohibit prisoners, communicate with the outside world and reduce threats to the prison. If used correctly, mobile jammers are definitely beneficial. Regardless of the environment, those who continue to talk over the phone may eventually remain silent. The interference will transmit a high-power signal at the same frequency as the mobile phone, causing the two signals to collide and cancel. This is the basic working principle of any jammer.