With the rapid development of science, the phenomenon of cheating in important exams in life using wireless communication devices such as wireless headphones and mobile phone terminals (including smartphones) is increasing. Exam organizers have adopted various methods to deal with this phenomenon, but today I would like to introduce a very effective anti-cheating device to everyone. This machine is a signal blocker that blocks communications such as mobile phones. The device emits interference radio waves in the same frequency band as those used by mobile phones and PHS, impairing the radio wave conditions received by mobile phones, resulting in the inability to use mobile phones near the device.

In one hall, a concert of a famous conductor was even interrupted. For this reason, theater operators and other theaters are currently strongly demanding the development of effective countermeasure technology. The frequency band range allocated to mobile phones, smartphones, etc. is not just a part of the frequency band, but a certain range, so how can a certain device interfere with radio waves in various frequency bands?

For those who want to crowd in as wide an area as possible (hall, waiting room, etc.). Most mobile phones and GPS devices have a probability of more than 98% that they can be taken out of range. It has the highest output of all general radio wave jammers currently on the market. Protect your privacy by preventing peeping and eavesdropping. In Japan, blocking radio waves without the permission of the Ministry of Internal Affairs and Communications may violate the Radio Law. However, customers need some useful information when buying a jammer, but it is not just general explanation information about how to use and where to apply it.

If you rush to the place where the wifi signal is blocked and search, you can find the car within a radius of 20m. You can also find the vehicle in the hotel parking lot. WiFi is a very convenient way to share files, videos and music at home or in the office. In addition, wireless LAN is also easy to set up and use in daily life. However, there is a major disadvantage. You can share information with friends and colleagues, but that information can be easily stolen. Therefore, wifi jammers make your data sensitive to privacy and personal interests

Isn't it possible to catch the culprit just by setting it up? I want to make a mobile phone jammer that can put my mobile phone out of signal range. If anyone knows the circuit diagram or has already made one, please tell me how to make it. I will not use it for pranks. It is just an experiment. I once asked the police about the jammer, and a lawyer I know said that it is difficult to arrest them unless the jamming radio waves are detected on the spot, that is, unless it is proved that they are being used at the time. Even if you are caught on the spot, the police can only give you a verbal warning.

It's been almost a month, right? The signal where we live is very poor, and it is difficult to surf the Internet and make phone calls. At first I thought it was a problem with the phone. "My name is Mr. Wang, and I live in Xincheng. According to the warehouse owner, "I bought this jammer to interfere with the GPS signal of the mortgaged vehicle, but I didn't expect it to cause trouble to the neighbors. I'm really sorry." said.