In communications technology, UHF VHF refers to radio waves from 30Mhz to 300MHz in the frequency band, most of which are used for radio and television broadcasting, as well as communication channels for aviation and navigation. In daily life, we use the frequency band of the most common device is walkie talkie.
The development of science and technology makes more and more devices using the signal spectrum, and is not only a walkie-talkie, surveillance cameras, wireless network cameras and other numerous small privacy candid camera equipment, may pose a threat to your safety. In addition, NFC technology, currently popular in smartphones, may make your phone a tool for you to be monitored.
Are you worried about your phone's privacy being stolen? Cell phone jammer can help you secure your phone, mainly by blocking signals from other people's mobile devices.