At present, the jammer signal devices on the market is dazzling and cannot be distinguished. Everyone needs to know how the signal jammer works before purchasing interference devices.
Mobile phone signal jammers are mainly used in various test sites, schools, gas stations, churches, courts, libraries, theaters, hospitals, prisons, public security, military heavy places (military jammers) and other places where mobile phones are prohibited. The cell phone signal blocker can only shield the phone signal without affecting other electronic devices. The power is 12W--480W and the shielding radius is 1-40 meters.
When the signal blocker is turned on, it scans from the low-end frequency of the forward channel to the high-end at a certain speed. The scanning speed can form garbled interference in the message received by the mobile phone, so that the mobile phone cannot detect the normal data sent from the base station, and the mobile phone cannot establish a connection with the base station. Mobile phones are characterized by search networks, no signals on mobile phones, and no service systems.
The mobile phone itself is a eavesdropping device. The mobile phone in the call state will send all the surrounding sounds to the receiver. Even if the mobile phone is turned off, the surrounding sound can be obtained by the proprietary eavesdropping device as long as the battery is not removed. jammer devices are designed to block all signals in a particular area to avoid eavesdropping and help block signals such as GSM 3G 4G WIFI GPS.
With the development of technology, many mobile phone jammers can reach small size, light weight, carry around, and some can even be placed in the pocket without affecting the interference frequency. For example, the mini gps jammers are equipped with a car charger, which can effectively protect their position, placement and tracking.
