The jammer is a very effective device to protect yourself. During operation, it scans from the low end of the front channel to the high end at a certain speed. This scanning speed will cause scrambled interference in the message signal received by the mobile communication, and the mobile communication cannot detect the normal data sent from the base station, so the mobile communication cannot establish a connection with the base station. Mobile communication manifests itself in network search, no signal, no service system, etc.
Of course, in terms of energy saving and heat dissipation, the built-in cell phone jammer cannot be compared with the external cell phone signal wave jammer. From the external structure point of view, the built-in mobile phone signal shielding device integrates the transmitting antenna, power supply and heat sink into an outer plastic shell, which is more beautiful in appearance, plug-in. and-play, and requires complex antenna connections, plug-in power supplies, etc. Advantage. It has great advantages in areas with a high flow of people, which are easy to manage, or in certain school examination rooms, meeting rooms and confidential places.
Then the external mobile phone signal shielding device adopts thickened pure aluminum alloy structure, and combines the circuit board and shell through processes such as oxidation baking varnish, making full use of the shell to achieve good heat dissipation. Since the antenna is connected to the shape memory alloy head and also connected to the power source, it is not suitable for long-term mobile use, complicated operation and little installation. convenient. However, due to the built-in cell phone signal protection device, the external heat dissipation effect is particularly strong. The effect of adapting and using the external transmitting antenna and the shielding device is better. Since the power supply of the external cell phone signal wifi jammer device is separate from the host, it will not add additional load to the host, and can work stably for a long time. By combining the above advantages, the present invention is more suitable for school classrooms, student dormitories, churches, troops, prisons, detention centers and other fixed places that require work. continuous and stable for 365 days.