With the development of science and technology, the location, tracking and monitoring of mobile phones have become important identification methods and means. Storing the phone in a secret place may cause serious injury. Mobile phone jammers can interfere with mobile phone communication. It will not interfere with other electronic devices. The jammer strictly complies with the quality system. https://www.perfectjammer.com/gps-blockers-jammers.html The use of jammers is prohibited in the United States. Before buying, you need to know some important things. You must check the law. If you break the law, it's too bad. Some countries have the highest cell phone radio wave blocking rate. The signal may be blocked. Some people use the most advanced technology to track people. Use deterrence to protect public places from list attacks. It is designed to block all cell phone signals in certain areas. https://www.perfectjammer.com/wireless-wifi-bluetooth-jammers.html