The shielding distance of the signal jammer is closely related to the equipment power and the use environment. The output power of the equipment, the working mode of the shielding, the impact intensity of the use environment (indoor or outdoor), and the surrounding environment have more or less an impact on the shielding effect.

At present, there are many 5W shielding devices in the market, and the actual power is less than 1W, so it must be the actual power. For low-power machines within 1W, the shielding distance is about 1-10 meters, and the shielding range is 10-30 square meters. The output power of such machines is wired through the wall with poor effect. Now many customers buy equipment. 2G and 3G calls can be blocked, but 4G calls can't be blocked. What's the reason? It's because there is a base station near you. At this time, because the signal strength of the base station is too strong, the low-power machine basically can't work. Then, where the shield is installed, is it a concrete wall or a glass partition? The interference signal will attenuate a lot when the shield passes through the wall. Therefore, it is recommended to buy a slightly higher power signal jammer sometimes.

To sum up, the shielding range of signal jammers is not solved by a single factor. It is suggested that before buying in large quantities, the best way is to test the signal strength of your installation environment with a spectrometer. The other is to buy several machines with different power, test the effect, and then decide which one to choose.