Nowadays, frequency jammer has been widely used in school examination room, prison detention center, company meeting room and other occasions, especially in school examination room. How to select these signal shielding devices? What problems should education departments pay attention to when purchasing frequency jammers? What are the differences between shielding equipment with different prices?

In fact, the price range of these shielding equipment is very large, ranging from hundreds to thousands, tens of thousands of yuan. Some prison detention centers use high-power signal shielding equipment, and the price is about tens of thousands of yuan, most of which are used in sensitive places in some areas. The frequency jammers used by secret organizations or some special organizations and enterprises also have relatively high requirements, such as medium power shielding products or specially customized enhanced products, and the price will also reach several thousand yuan. The shielding devices used in the school examination room are generally due to the cost budget and other reasons, and the use requirements are relatively low. The price is generally about 1000 yuan. The products within this range can also be divided into high, middle and low grades. There are differences in shielding effect, continuous working time, heat dissipation, noise and other aspects, mainly depending on the actual needs of the user. As for some very cheap signal shielding products, they may want to attract attention with low prices. After all, the price of materials is there, so it is not recommended to buy such products.