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Built-in Antenna Jammer WiFi/Bluetooth + UHF + VHF + 2G/3G/4G Mobile Phone signal Blocker (also known as a signal blocker/circuit breaker/suppressor/truncator/isolator/meeting information security machine) is our factory using foreign advanced technology.Mainly used in the national college entrance examination, adult college entrance examination, self-study exams and the status of college and university exams, some criminals use mobile phones to cheat, combined with various types of middle school students and high school students to use mobile phones in the school hours regardless of the consequences SMS and government agencies, small conference rooms in various large and medium-sized enterprises, concert halls, theaters, and other places are seriously annoying and noisy.According to the actual situation of domestic mobile communication high-tech developed products, it is considered that the radius of 1-15 meters (1-200 square meters) in the GSM/DCS/CDMA/PHS/3G (TD-S) zone (CDMA/CDMA2000/WCDMA)/4G Mobile phone signal, 2.4GWIFI radio signal, and radio transmission band UHF400-470M, VHF136-167M, unable to make and receive calls, the radio does not work, but does not interfere with other electronic teaching equipment when the work of the mobile phone and radio is out of range, you can return to normal use.

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