Depending on the shielding range and the port data used, cell phone jammers are divided into the following situations:
The first category: in a small range of 0-10 meters, the area is less than 120 square meters. Low power cell phone jammer. The shielding effect varies with the distance between the location and the base station, and the shielding range depends mainly on the strength of the magnetic field. Can recommend 4 way 6 terminal cell phone jammers. Low power shielding through the wall will weaken the signal. If you have to go into a wall, it is recommended not to buy a low wattage wall.
The second type: there is no base station within 1 km. At less than 120 square meters, one is enough. It is recommended to use two units with an area of 120 to 250 square meters. It is recommended to set up a large conference room within a radius of 150 square meters, two for 250 square meters and four for 600 square meters. Installing more than 3 units in an area will form a honeycomb shielding effect.
The third category: the number of meters that the jammer can protect is not only related to its own transmit power, but also to the distance from the base station in the environment (base stations are not limited to large-scale transmission towers built on base stations). On the ground, it also includes the signal amplification antenna on the roof and the signal amplification distribution in some buildings). Obstacles are another important factor. If it is a metallic material, it will be directly blocked; if it is a solid reinforced concrete wall, it will weaken at least 10 times after penetration.
The fourth category: the strength of the magnetic field signal. When the magnetic field is weak, install one in 2.5 classrooms. If there are 10 classrooms in a row, please set up 3 in the aisle; when the magnetic field is strong, base stations within 500 meters, base stations within 300 meters, base stations within 200 meters, and base stations within 100 meters. Base station, there is a base station on the roof, it can only depend on the situation, the stronger the magnetic field, the more signal jammers need to be installed.
Therefore, when installing a portable gsm jammer, you must first understand your surrounding environment and the area you want to use, and then decide on the type of jammer to purchase.