Now the communication is more and more developed, but sometimes it is unnecessary to use it. For example, in the process of the exam, the signal will obviously make the exam unfair. In order to shield the signal better, we should choose a better network jammer. The network jammer produced by our company is specially designed, developed and produced by adopting advanced shielding technology according to market demand. The equipment has been upgraded to a maximum of 12 channels, which increases the shielding effect of the equipment itself on signals. At the same time, the new 5G band solves the problem that other products cannot shield the 5G band, and the shielding effect is better than other similar products, with stronger shielding effect and more stable performance. When the network jammer enters the working state, it can automatically form a shielding magnetic field within the specified range, forcibly disable the mobile phone signal, and shield the communication signal without interfering with other electronic devices. The emergence of network jammers may completely solve the damage caused to users by the information leakage of communication equipment, so that people can not only enjoy the convenience brought by high-tech to human beings, but also ensure the safety of their information, thus solving some negative effects caused by mobile phone signals in some lives. At present, most of the shopping is done online, but products like network jammers need to choose a good manufacturer.