Today, we recommend that all universities install smartphone signal jammers at the test site to prevent cheating on exams. In order to prevent candidates from using unfair means with some high-tech equipment, low-power jammers are allowed at the test site. During the tests conducted, some students used Bluetooth and headsets to communicate with external handlers. Jammers are easily available on the Internet. Due to this interference, both mobile phones and Wi-Fi are disabled.
This article introduces a jammer that cannot make a call at a subway station. It places a mobile phone or smart phone out of range and uses it widely. At a distance outside this range, you can finally talk. If you speak loudly and casually, the people around you will feel uncomfortable. I like to be quiet, so we installed this gsm radio shield in the subway station, and the signal received by the mobile phone is not good.
If you want to interfere with multiple frequency bands, our multi-functional GSM jammers can meet your requirements. 2G 3G 4G 5G has a strong interference ability, which can block mobile phone signals at the same time. The electromagnetic wave cover of a smart phone can determine the interference distance according to the actual situation, and the connection with the phone is often lost. I used a radio jammer to cause radio interference, and radio waves disappeared and went out of range in the blink of an eye. Now, the number of people interested is increasing.