With the penetration of mobile phones into every corner of life, people are increasingly dependent on mobile phones. In some scenarios, some people want to block mobile phone signals, and blocking mobile phone signals seems "very simple" at present. In the Google search interface, enter the search content of the mobile cell phone jammer
, and tens of thousands of pieces of information pop up, many of which are advertisements selling related products on the Internet. At the same time, there are similar products for sale on Taobao. Get in touch with a random seller, who is said to be able to buy a mobile $1 - $100 cell phone jammer
without any formalities, guaranteeing the desired interference effect.
The working principle of the portable mobile phone signal jammer
is also relatively simple. It is to use frequency multiplication, frequency division, frequency hopping filtering and other technologies for the electromagnetic frequency uplink and downlink channels covered by the mobile signal to analyze the required shielding frequency. When the shielding device is in working condition , customize a spherical shielding space according to the power of the shielding instrument, so that the mobile phone in this space is invalid, unable to receive and call out, so as to achieve the purpose of forcibly disabling the mobile phone. At present, the working time of mobile Cheap $1 - $100 Mini cell phone jammer
sold on the market generally exceeds 24 hours, and the range of shielding signals ranges from a radius of 20 meters to a radius of 70 meters. To put it simply, it is possible to spend thousands of yuan, and all mobile phones in a building may not be able to dial out or call in, which is a great security risk.