I think many people know the term jammer after passing the exam, and jammer is also used in other situations. It is widely used in mobile phones, wifi and various places where gps signals need to be shielded. So, what is the classification of jammers? I will introduce them. Mobile cell phone jammer are divided into special signal jammers used in test places, wall-type mobile phone jammers and so on. As the name suggests, special laboratory jammers can play a supervisory role and prevent candidates from cheating. Specially used for inspection. This wall-mounted mobile phone jammer, jammer, is more suitable for high-end secret places, it is difficult to distinguish and is very beautifully hidden.
So how to choose a mobile phone signal jammer?
1. Make sure you know the frequency of the network. In Africa, Europe, the Middle East and Asia, most regions use the 900 MHz and 1800 MHz frequency bands.
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 phone jammer can provide you with complete information about Verizon frequencies 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.