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 mobile phone signal jammer 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, generally Generally speaking, the effective range is within a radius of 0 to 30 meters. Generally, a low-power test mobile phone signal jammer is enough to cover an entire classroom, which meets the needs of the test room for shielding signals, and because the battery life of this kind of equipment is average. There are three hours. Although the heat dissipation is poor, this also makes the price/performance ratio particularly high, which is especially suitable for schools to buy signal shielding for the examination room.
When the mobile phone signal jammer is working, if the transmission power is too large due to the improper setting, in a small-scale conference room, classroom and other confined spaces, the electromagnetic waves are superimposed in the narrow space, and the electromagnetic waves will pass through the walls, ceilings, and floors that are originally separated from the outside. The secondary reflection will cause the personnel in the room to be exposed to more serious electromagnetic pollution. According to the survey, the college entrance examination and the senior high school entrance examination are the occasions where mobile cell phone jammer are used the most. However, in some test rooms that use cell phone signal jammers, some parties (gaokao inspectors, candidates and teachers) are in a state of irritability and inability to concentrate. even headaches. There are various indications that if the transmission power of the mobile phone signal jammer is too large, it will seriously affect the normal thinking of candidates in the examination room.