Phone Signal GSM 925-960MHz
The GSM cell phone jammer is one of the most popular mobile jammers. It is often used in school classrooms, education institutions, examination halls and other places. Normally, this kind of interference device also has interference with 3G,4G and other commonly used signal functions, which can ensure that the cell phone signal is completely cut off.
When you have important meetings or secret meetings, this kind of jamming device can be a good way to prevent leaks and eavesdropping.