In modern society, the speed and scope of information circulation are constantly expanding, which brings convenience, but also brings some information interference and security risks. In this case, signal jammers have gradually entered people's field of vision. These devices can block wireless signals in specific frequency bands, thereby helping us filter out some unnecessary information and maintain communication security. Mobile phone jammers mainly interfere with mobile phone signals and are very suitable for use in some occasions where mobile phones are not suitable. For example, in cultural places such as cinemas and theaters, mobile phone jammers can block mobile phone signals, prevent behaviors such as taking pictures and recording, and enhance the audience's viewing experience. Similarly, in some examination venues, the use of mobile phone scrambler ( https://www.jammermfg.com/cell-phone-jammers.html ) can effectively reduce the possibility of students cheating and maintain the fairness of the examination. In addition, mobile phone jammers are also actively used in some security-sensitive places (such as prisons). They can prevent prisoners from using mobile phones to contact the outside world and maintain internal security. At the same time, in some special activities (such as large-scale performances or activities), mobile phone jammers can also avoid the risk of information leakage and ensure the smooth progress of activities. GPS jammers are mainly used to interfere with global positioning system (GPS) signals. In certain specific occasions, GPS jammers can protect users' location information and prevent them from being tracked by others. For example, in the transportation of some high-value items, the use of GPS jammer ( https://www.jammermfg.com/gps-jammer.html ) can prevent thieves from tracking and committing crimes based on the vehicle's GPS location. In addition, GPS jammers also play an important role in the military field. In a complex battlefield environment, the enemy may use GPS for precision strikes. The use of GPS jammers can effectively interfere with the enemy's positioning capabilities and provide tactical advantages for our war operations.