Brand mobile phone jammers are mainly used in school examination rooms, prisons, detention centers and other places where mobile phones are prohibited from entering. So how should we choose a suitable mobile phone jammer according to our needs? From the perspective of our manufacturer, if the choice is improper, the installation has no effect, it is easy to cause the product to be returned or exchanged, and waste time and waste freight. How many meters a mobile cell phone jammer can shield is not only related to its own transmit power, but also to the distance of the base station in the environment (base stations are not limited to large-scale transmission towers built on the ground, but also signal amplification on the roof. Antennas and signal amplification and distribution in some buildings), another important factor is obstacles, if it is a metal material, it will be directly blocked; if it is a solid wall of reinforced concrete, it will attenuate at least 10 times after penetration.
For better shielding effect, you can also put the mobile phone jammer on a chair or table, the best distance of 1.5-2 meters from the ground. Of course, it can also be placed directly on the ground, depending on the strength of the local wireless signal, or one at the front and back of the classroom to better ensure the shielding effect. If you only want to place a mobile phone signal jammer and worry that it is difficult to shield the area behind the classroom at the front podium, you can put the mobile phone jammer in the middle of the side of the classroom. At this time, the shielding device needs to have less length on both sides of the shielding, and the effect will be better. Of course, the problem of the power cord needs to be solved, and there may be no power jack in the middle position.