In the interference range, it will interfere with mobile phones and smart phones. You cannot make calls within this range. It has a built-in dedicated lithium-ion charging area that can be charged from a socket. You can prevent unnecessary calls. When it is necessary to strictly protect confidential information and personal information, communication with the outside can be blocked, and information leakage can be prevented. The electromagnetic wave protective cover of the smartphone transmits at the same radio frequency as the mobile phone and interrupts the communication between the mobile phone tower phone and the mobile phone base station. My size is small. Using clever design. You can block the frequency of the phone. There are many reasons to consider using cell phone jammer. We can send text messages to each other during the exam. The gps radio blocking method is also useful when other users such as movie theaters and libraries can enjoy quiet activities.
How to choose a telephone signal jammer?
1. Make sure you know the frequency of the network. In Africa, Europe, the Middle East and Asia, 900 MHz and 1800 MHz frequency bands are used in most regions.
2. Make sure you understand the local communication service provider. In France, the largest providers are 3G, 4G, CDMA and GSM. Before buying a phone signal jammer, you should check it on the Internet. The signal jammer can provide you with complete information about the Verizon frequency in your area.
3. Determine the required interference range and application purpose. For smaller areas (such as classrooms), a small and movable area is sufficient. However, if you want to use it in a theater center that can accommodate 10,000 seats, you need to purchase a large-capacity telephone signal jammer with a wide interference range.