With the development of science and technology, electronic products such as mobile phones have developed tremendously. Useful for everyday life. On the other hand, there are disadvantages. For example, students often use their phones to cheat during the test, which negatively affects the fairness of the exam. More and more students are using smartphones in class. For teachers, how to prevent students from using smartphones is an annoying problem. The countermeasures against these problems use wifi jammer.
These jammer devices can limit a radius of approximately 2-20m, and the shielding range may vary depending on the surrounding environment. Therefore, when using this product, make sure that there are no metal objects around. The product also comes with a car charger. Can be charged in commercial vehicles. Very convenient. In addition, you can choose to block other radio waves. Some products are dedicated to GPS. Some products can block GSM, 3G and 4G signals from mobile phones. Customers can choose different products based on the type of signal blocking.