Demonstration 5-band jammer device installation and use, this jammers can block 2G, 3G, WiFi signals
cell phone jammerss are increasingly used in qualifying exams
Received questions
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More and more qualification tests are now starting to block cell phone signals. Even high school exams now use them. So is this device really effective in preventing cheating?
Second floor
In Italy, after sending text messages to college students or taking pictures of students during the exam, they found that teenagers with mobile phone experience were cheated during the exam, and schools began to use wifi jammer to stop this phenomenon.
A local principal said: “There are still many people who don’t follow the rules during the exam?Unfortunately, we have no choice but to use these small devices. "Their purchase price is about $300, and their low radio frequency can interfere with cell phone signals within a 30-meter radius.
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