Since the advent of mobile phone signal jammer, it has been widely used in examination rooms, schools, prisons and other units. At the same time, it has also won a lot of praise and trust in mobile phone signal jammer. In fact, mobile phone signal shielding instrument is not a new technology in foreign countries.

In recent years, it has also started large-scale sales in the domestic market, which has brought good news to many places that restrict the use of mobile phones! The mobile Signal Jammer only interferes with the downlink signal of the base station, and will not affect the base station of the operator, nor will it interfere with the normal use of other electronic products!

Now many primary and secondary school students, one mobile phone per person, have come to the point of extreme dependence on mobile phones. Some are addicted to online games, some are addicted to novels, and even browse some unhealthy and low-grade videos or pictures. It is more dangerous for school exams. You can search the answers of test questions. If everyone plagiarizes with mobile phones, it will violate the purpose and significance of the exam!