Every year during the high school and college entrance examination, there will be network problems around the school such as dropped calls and slow Internet access. This is because the school has turned on mobile phone jammers. If we regard the mobile phone as a handheld two-way radio, the radio can be interfered, and the mobile phone is no exception. Just like any radio, the signal of a mobile phone can be disturbed.

The principle of the mobile phone signal jammer is: within a…

With the improvement and improvement of the performance of recording equipment, people's use and development of sound have reached an unprecedented height. But while the development of science and technology brings convenience to mankind, it also produces a series of negative problems. As a high-tech product, the recording blocker is slowly being understood and accepted by people. Its function is to effectively prevent illegal recording, so that people can speak freely without worrying about…

The principle of HF and GSM jamming systems (also known as signal jammer) is to send a stronger signal in the same frequency range in order to drown out the original signal between the transmitter and receiver without drowning out the wire to make the exchanged frames inoperable. An increasingly used method with which certain alarm systems, but also many peripheral devices, can be neutralized with the help of radio waves (GSM…

A security researcher has shown that disrupting WiFi, Bluetooth, and ZigBee networks isn't difficult, but most importantly, wifi blocker is not as costly as you might think.

According to Mathy Vanhoef, a PhD student at KU Leuven (Belgium), this can be easily done with a $ 15 Wi-Fi dongle bought from Amazon, a Raspberry Pi board, and an amplifier that spans the range of the attack on some…

The eavesdropping device's multifunctional cell phone jammer prevents the operation of all spy bugs and offers reliable protection against spying and eavesdropping. This portable jammer can be taken anywhere, is easy to use and extremely reliable.

A hand signal jammer works on the principle of data transmission between spy devices. Portable jammer contain powerful transmitters (antennas) that emit…

The possible uses of mobile phone jammers are diverse. For example, stores can use it to prevent potential customers from making price comparisons on smartphones, and teachers can use jammers during school or exams to prevent the use of mobile phones.

According to a report by RTL (Part 3 of the series), anyone who wants to compare prices with smartphones in electronic stores should avoid doing so. The motto of this private broadcaster is "With the help of the Internet, you can bargain…