As for the network jammer, it is a product used for communication supervision. It is designed to supervise the seriousness and quietness of examination halls, prisons, detention centers and other places, and ensure the fairness and justice of the examination. Now, it is used for the high school entrance examination, the college entrance examination or the usual simulated examination. Most of them will install network jammers to jam signals. So when purchasing, you should choose high-power or low-power network jammers. What is the difference between them?

When purchasing a network jammer, you must first know where to use it. If it is used indoors, such as in an examination room, a conference room, an office, etc., you can use a low-power model. If it is in an open outdoor area, you need to use a high-power network jammer to achieve an effective shielding distance.

From the appearance, the network jammer can be divided into an external antenna and a built-in antenna. Generally speaking, the external antenna is usually used for high-power machines, while the built-in antenna is mostly prepared for low-power machines. Since the network jammer antenna is external and extends outward, it occupies a larger space volume compared with the built-in antenna, but also because the antenna extends outward, The shielding effect of the external antenna is more stable.

In terms of shielding range, there are many low-power network jammers used in the examination room. One can be installed in a classroom, and the shielding range is about 200 square meters; The shielding distance of high-power network jammer can reach 300-400 meters (according to the actual local field strength

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In terms of volume, the high-power network jammer is designed as a trailer, which is very large. Smaller is a small power desktop machine, which is relatively small and easy to carry.