Can the test signal blocker block all communication signals? Speaking of it, many people are unfamiliar with the test signal jammer. In fact, it has been widely used in the examination room of the college entrance examination. The response has been very good, and it has been proven to have a good effect on eliminating electronic signal cheating methods. Since this year, it has been vigorously promoted, so that more test rooms can also install shielding devices.

Nowadays, the appearance of the shielding device has solved many hidden dangers of disrupting the order for the examination room, so that the candidates can take the examination in a fair environment. The principle of this test signal blocker is actually to isolate the electronic signal, so that the communication signal of the mobile phone fails, which can prevent the phenomenon of cheating by using the mobile phone. Not only that, it also has a good shielding effect for the WIFI2.4G signal. It is said that the effective range is within a radius of 0 to 30 meters. Generally, a low-power test signal blocker is enough to cover an entire classroom, which meets the needs of the test room for blocking signals, and because the battery life of this kind of equipment generally has three. Hour, although the heat dissipation is poor, it also leads to a particularly high price/performance ratio, which is especially suitable for schools to buy signal shielding for the examination room. The trouble of purchasing a cell phone signal jammer for exams is something that many customers have.

Here are some signal jammers that you need to use in the exam room:

Premise: There is no base station ≥500 meters around the school

1. If you want to choose an internal antenna, do not use an external antenna, because the general test shields are brought into the classroom by the invigilator before the exam. Many careless invigilators can easily screw the antenna wrong, causing the shield to fail.

2. There is no need to choose an industrial-grade power supply, because the school budget is generally a small budget, and the shielding device of the industrial-grade power supply (can be turned on 24 hours) is more expensive, so it is recommended that schools choose a non-industrial-grade power supply shielding device to save the budget.