In this era, many examination halls are using a device that can effectively block mobile signals, that is, cell phone jammers. However, many mobile phone signal jammers today are fully enclosed, which does not have much advantage in terms of signal shielding effect.
Therefore, many people have noticed what effects and functions these devices they bought have. Some people are still very confused, and some people will ask how it is different from the full-band signal blockers they have seen. What about the antenna on it? After understanding that the mobile phone signal jammer uses a built-in antenna, I know that it can effectively block 2G, 3G, 4G, 5G, and wifi signals.
When the mobile phone signal jammer was developed and designed, it was considered that there might be human damage, so it was deliberately designed with a built-in antenna. In addition to this, it has many other differences, such as turning the desktop fan into an ultra-quiet silent fan in order to protect students' exams. The mobile phone signal jammer can not only be used for indoor decoration, but also be installed outdoors with a waterproof and rainproof design, so there is no need to worry about thunder and rain.
The built-in antenna is very safe, avoiding human damage, and long-term operation is relatively stable and not prone to failure. It is easy to use. Just connect the power supply and it will work normally. There is no complicated operation. This is very good. It is the reason why the mobile phone signal jammer is so easy to use. Because the antenna is installed before leaving the factory, the customer only needs to hang it on the wall or put it directly on the table according to the screw hole on the back of the server. It is very convenient to assemble and use.