At Chengdu University of Science and Technology, classrooms in the new building are equipped with "mobile phone signal jammers", which are a good way to prevent students from using mobile phones in class. Is the school really trying to block students’ cell phone signals? In the second teaching building of the school, the watch was found in an empty classroom. The watch is closer to the blackboard on the seemingly "black" wall of the instrument science and technology. The instrument is also located on the automatic switch and displayed by Internet users. That is cell phone jammer. In this empty classroom, the power cord was not connected to the signal shield and the switch was not turned on. Therefore, the reporter's mobile phone signal is normal and the network can be used normally. The reporter will also find several floors in the second classroom building, both a school classroom and an empty classroom. The cellular signal remains unchanged, and you can receive information, make calls, and use the Internet.
After years of development, there are many types of mobile phone jammers available, such as mobile phone jammers, desktop jammers. Different cell phone jammers can be used in different places. If you want to block the signal of the cell phone in the room, a cell phone jammer is sufficient. However, if you want to use a larger position, you need to use a desktop jammer. Second, where to use it. If you want to take it with you and use it elsewhere, then a portable jammer will be a good choice. Most jammers are multifunctional jammers. Some combine cell phone jammers with GPS jammers, and some combine cell phone jammers with wifi jammers. You should consider your own situation and choose the appropriate function. The next law is as follows. In some countries/regions, jammers are not allowed. This means that you cannot buy or sell or use jammers in these countries. Before buying a jammer, you should check whether it is legal.