Please use cell phone signal jammer with caution!
With the popularization of mobile phones, the demand for mobile phone signal shielding in various meetings and examinations has also increased significantly, so there is naturally a wide market for mobile phone signal shielding devices. However, most customers lack sufficient knowledge of mobile phone signal jammers, and often choose high-power jammers one-sidedly in order to achieve good results, causing many hidden dangers.
The principle of the cell phone signal jammer is to use broadband to transmit interference signals to interfere with the uplink signal of the mobile phone to achieve the function of shielding the work of the mobile phone. Therefore, it is a signal emission source in itself. Since it is a signal emission source, there is naturally radiation. The current shielding device has a transmission power ranging from 1W to 480W according to the needs of use. How strong is this transmission power? For comparison, the maximum transmit power of a GSM mobile phone is 2W, and the usual transmit power of a GSM macro base station is between 20W-40W. The transmission power of the shielding device generally used for examinations and meetings is between 10W-60W.
Under normal circumstances, for general exams and small meetings, choosing a mobile phone jammer with a 2W-10W transmit power can achieve good results. However, according to our investigation of major schools and important meeting locations, many places are often one-sided pursuit of high-power jammers, such as: a school with more than 20 classrooms, each classroom is equipped with a jammer, and selected It has a 30W transmission power, and after the exam is over, due to inadequate use, a small number of shielding devices are often not closed in time, and the transmission continues for several weeks. Especially in a certain elementary school, after a certain exam, the shielding device has not been turned off for 2 weeks. It was not until we checked the scene that the shielding device was continuously turned on on the side of the classroom podium full of pupils in class! This really made us sweat!
Therefore, I strongly appeal to all major units that need to use cell phone signal jammers:
1. Do not blindly choose a high power jammer. For a classroom, choosing a jammer with a 2W transmit power is enough to achieve the shielding effect.
2. After finishing use, be sure to close the shield in time to avoid continuous radiation.
3. Be sure to choose a shielding device produced by a regular manufacturer. The shielding device produced by an informal manufacturer often deliberately increases the transmission power in pursuit of a good shielding effect.
For your health and your family's health, please forward the news, thank you!