With the popularity of mobile phones, the demand for mobile phone signal jammers in various meetings and examinations has greatly increased. Therefore, mobile phone signal jamming naturally has a broad market. However, most users lack sufficient understanding of mobile phone signal jammer. In order to achieve better results, one-sided selection of high-power Mobile Phone Signal Jammer will bring many hidden dangers.

The principle of mobile phone signal jammer is to use broadband to send interference signal to interfere with the uplink signal of mobile phone, so as to shield the working effect of mobile phone. Therefore, this itself is the origin of the signal. As a signal source, there will be radiation naturally. According to the use requirements, the transmission power of the existing mobile phone signal jammer ranges from 1W to 100W. The transmission power of ordinary mobile phone signal jammer for examination and conference is between 10W and 60W.

In general, for general examination rooms and small meetings, choosing a mobile phone signal jammer with 2w-10w transmission power can achieve good interference effect. However, from our investigation of large schools and important meeting places, many places often unilaterally pursue high-power interference. For example, in a school with more than 20 classrooms, each classroom is equipped with a mobile phone signal jammer with a transmission power of 30W. In addition, after the examination, due to the lack of attention to the use, a small number of mobile phone signal jammers often fail to shut down in time and transmit interference signals for a long time. Especially in some primary schools, after the exam, the mobile phone signal jammer has not been turned off for two consecutive weeks.