Exam signal jammers have been actively disseminated and used. The college entrance examination season is approaching. Now you can see the test signal jammer in the labs of major schools. Why are more and more schools installing this kind of equipment? In fact, it will only become popular when there is demand. This is because the problem of cheating has become more and more common in recent years, and the various methods of cheating that frequently appear are frightening. In order to effectively solve this problem, it has been found that this kind of shielding device that causes this kind of cheating is specially used in the examination room. Its appearance is very helpful to many examination rooms, and more and more people choose to prevent electronic signal cheating. I Is doing this. https://www.greatjammer.com/