Factor 1: Shielding is efficient
The so-called shielding efficiency refers to whether the shielding effect has blind spots or leaks. There may be transmitting base stations with strong mobile phone signals near some prisons. In order to achieve a good shielding effect, a lot of materials and energy will be spent, and the cost will increase accordingly. Therefore, the better the wifi jammer effect, the higher the cost will be. In actual application, the shielding requirements in prison areas are generally higher. If there are slight loopholes or blind spots, violators may seize this loophole, allowing mobile phones to be used in the original shielded area, and the original intention of shielding mobile phones cannot be achieved.
Factor 2: Time between failures
If the original trouble-free service life is 1 year, and the actual trouble-free life reaches 3 years, the cost-effectiveness will be tripled.
If the original trouble-free service life is one year, in actual use, it often breaks down in less than half a year. Although the warranty is free, the risks caused are immeasurable, human resources are wasted, and the corresponding cost performance is greatly reduced.
Factor three: external interference
If external interference is not considered, simple shielding will be relatively easy, as long as the signal jammer power is increased. However, it is necessary to ensure that there are no blind spots or leakage points in the shielding area. The power intensity in the shielding area is relatively large. If there is a little leakage, the external interference will be great. This requires full consideration during shielding design and technical control to achieve accurate and efficient shielding without external interference.
Factor 4: Cost
The cost should follow the shielding requirements and budget. You cannot blindly choose cheap products, nor should you think that the more expensive ones are better. In actual selection, reputation is very important. It is also necessary to conduct on-site inspection of past cases and personally test the shielding effect before making your selection.