With the popularity of mobile phones, the demand for mobile phone shielding devices for various meetings, exams and so on has gradually increased, thus opening up a broad market for mobile phone shielding devices. But there are still many users of cell phone blocker is not enough to understand, thought the use of high-power mobile phone shielding can get better results, in fact, this idea is wrong, there is a great security risks.
The working principle of the mobile phone screener is to interfere with the uplink signal of the mobile phone with the help of broadband transmission of interference signals, and then achieve the shielding of the work of the mobile phone. So, this itself is a signal transmitter. And the signal transmitter generates radiation. According to the use of demand, the current mobile phone shield shielding transmitter power range between 1W and 480W.
Usually, for general exams and small meetings, the use of 2W-10W transmitting power Dazhan electronic mobile phone shield can achieve good results. But from the investigation of major schools and important meeting places, many places only pursue high power shielding alone. For example, a more than 20 classrooms, each classroom applies a mobile phone shield, and choose 30W transmit power. After the inspection, because of the lack of proper use, often the signal jammer did not turn off in time, resulting in weeks of continuous emission of the phenomenon.
Therefore, the application of mobile phone shielding units should pay attention to the following three points:
1, do not blindly apply high-power mobile phone shield. A classroom application of 2W transmit power shielding can achieve the effect of shielding.
2, at the end of the use, you need to close the mobile phone shield in a timely manner to avoid causing continuous radiation.
3, be sure to choose the mobile phone shield produced by regular manufacturers.