GPS jammers operate in military bases.
https://www.jammer-mart.com/portable-gps-blockers-jammers.html
To achieve the purpose of blocking the data signal. The criminal is about 160 cm tall and thin. And the growth of smartphone users, which can be used for hackers, and the vulnerabilities of WiFi encryption protocols can lead to even worse statistics. All kinds of large and medium exams. The staff prepares the Sistine Chapel. wifi jammer , press a key to enter to lock the door, press 2 keys for the door) to open and operate the vehicle through the host’s control system. The Central Military Commission, the Central Office and the State Council have all issued relevant regulations to ban the use of mobile phones at some important secret occasions or meetings. Liptak said he is pro-education. Handy jammer homemade has high technical requirements. So what happens to the mobile phone after using the signal jammer?
https://www.jammer-mart.com/drone-uav-jammers.html