When purchasing signal blockers for standardized examination rooms, it is necessary to choose products that test the blocking effect. During the selection process, it is important to consider whether they can block all current mobile signal networks. The power size and functional model of the shield also have different effects. So it is necessary to choose a signal shielding instrument manufacturer that is suitable for the situation and has good shielding effects. The new type of exam signal blocker is widely used in the high school entrance examination. Based on past experience in preventing cheating in exam rooms and the problems that have arisen, it is important to pay attention to the following points when choosing a good mobile phone blocker for exam rooms:

1、 According to the power and application range of signal blockers, they can be divided into several types: conference room specific, military specific, prison specific mobile phone signal blockers, various types of high school entrance examination room specific blockers, gas station specific and confidential place specific mobile phone blockers, etc. The prices of different types of blockers also vary. According to the different surrounding environments, in order to better play its role, the examination room must choose a special shielding device for the examination room.
2、 Due to the rapid updating of modern mobile networks, especially after the issuance of 5G signal licenses, the network speed function of mobile phones has become more powerful. The convenient and fast internet access function has also increased the difficulty of preventing cheating in the college entrance examination.
3、 Choosing a signal shield for the exam also depends on whether the shield manufacturer has the corresponding product certification and testing qualifications to ensure quality and performance. During the exam, cheating candidates use different mobile networks, especially the 5G mobile network which uses broadband high-speed transmission. If the power or frequency scanning technology of the mobile blocker is not good, it may not be able to block the 5G signal. Therefore, it is necessary to compare the products of different blockers used by three different companies for testing to ensure that each type of mobile network can meet the minimum requirement of one classroom before passing the test!