Signal jammers can block signals from most wireless devices, such as mobile phones, GpS, wireless networks, Bluetooth, remote controls, etc. However, it will not affect the communication of wired devices. Signal jammers can interfere with wireless microphones, especially those operating in the frequency range of interfering signals. By transmitting interference signals, the wireless microphone can be disabled or misreported, thereby interfering with audio services. However, when using signal jammers to interfere with wireless microphones, it is necessary to comply with relevant laws and regulations, and be careful not to cause interference to other devices and users.
The frequency of 2G calls and data access is separate. Field surveys are required to distinguish the frequencies of 2G and 4G signals. Adjust the frequency in each frequency band to only block internet data and retain 2G calls.
Why bother? After on-site investigation and adjustment of the frequency band of the mobile phone blocker, there may be effects at that time, but over time, the operator may adjust the frequency. After adjustment, the adjusted mobile phone signal time shield is completely useless.
