Mobile phones are an important communication tool in today's society. With the development of mobile phones, mobile phones are not only a communication tool, but also an essential device in our lives and work. It enriches our entertainment life so that we can learn more about the outside world and keep up with the times. A mobile phone is a device that needs a signal to work, and a mobile phone without a signal is like a brain without a brain. With the development of science and technology, mobile phone signals are gradually upgrading. From the initial 2g and 3g to the current 4g, the speed has been greatly improved, which can meet people's needs for the Internet.

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In order to ensure the blocking effect and long-term stable operation, a strong electromagnetic environment should be avoided. When you are not using a portable Bluetooth jammer, you need to turn off the power for a while. When used outdoors, waterproofing is very important. When the deterrent device is running, please do not disassemble the antenna to avoid affecting the shielding effect. The actual shielding range may vary depending on the location of use. The effective enclosed area is a circular area centered on the area. The effective distance (30-40 m) of the mobile unit jammer usually refers to the indoor distance.

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