if you know where are laser jammers legal

In fact, the easiest way to block cell phone signals is to turn on the phone's airplane mode. The airplane mode of the mobile phone is a convenient mobile phone signal mode introduced by the manufacturer in order to satisfy the users in some occasions where the mobile phone signal is not allowed to appear. For example, on an airplane, in a meeting, when you need to concentrate on something, and when you need a good sleep. Secondly, some specific frequencies emitted by other signal transmitting and receiving devices can also interfere with the communication signal of the mobile phone. In addition, some places with strong or abnormal magnetic fields can also interfere with mobile phone signals to a certain extent.

In today's mobile Internet era, smart phones are very popular. However, things that bring convenience to people's lives and are used for illegal activities emerge in endlessly. Take the test as an example. In the past, cheating relied on cheat sheets, smuggling notes, and even writing formal questions on arms and legs.However, in this information age, the participation of mobile phone signal jammers is of course indispensable in the examination room. The emergence of cell phone jammer has solved many hidden dangers, which will interfere with the order of the examination room and enable candidates to take the exam. Fair environment. Many schools have installed cell phone jammers. 

Cell phone signal jammer is one of the indispensable equipment in inspection rooms, prisons, gas stations and other places. It has the function of blocking cell phone signals and preventing cell phones from working normally.Considering the size of the cell phone signal jammer in the examination room, it is not very large and can be conveniently placed anywhere in the examination room without additional space. And there is no noise, and the use of shielding equipment will not have a significant impact on the candidates.In addition, you don't have to worry about their impact on other electronic devices, it is mainly to shield your mobile phone signal.