Signal jammers generally only shield electronic devices within range

[Perfect Jammer]

The prison jammer decided to block all cell phone signals in the prison. We have two high-power versions, each with an output power of up to 100 watts, and up to 7 frequency bands can be customized for GSM, DCS jammers, PCS, 3G, 4G LTE signals Winmax; Supports up to 6 frequency bands, with a 90-degree antenna protection range of up to 60 meters, two frequency bands in one antenna, 20-30 units can be installed centrally, which can protect all mobile phone signals. For important meetings, our cell phone jammers can protect your calls from being spied by other competitors; for church cinemas, use our jammers to keep them in a quiet place, and for private spaces, use our jammers to keep them in a quiet place. Ensure safety.

https://www.perfectjammer.com/all-cell-phone-jammers-blockers.html

Handheld 5g jammer

A mobile phone jammer that suppresses communication with a mobile phone or the like emits interfering radio waves in the same frequency band as the frequency band used by the mobile phone or PHS, and worsens the radio wave condition received by the mobile phone. It is to prevent the use of mobile phones in the surrounding area. Detailed introduction to WiFi jammers Disable eavesdropping devices and SIM eavesdropping devices that use mobile terminals (including smartphones and iphones). Even if eavesdropping devices using mobile phone terminals (including smartphones and iPhones) or SIM card eavesdropping devices are installed indoors or in cars, it will block communications (outside the service area/interference) to prevent eavesdropping. By sending a high-power radio frequency signal within the same range as the mobile phone communication signal that needs to be shielded, it may cause interference to the mobile phone communication (in a specific area). This wifi jammer can be used to select a series of cutoff frequencies and selectively block only these frequencies. It can be used to prevent GSM, CDMA, 3G/4G and other popular mobile standards from working.

https://www.perfectjammer.com/gps-blockers-jammers.html

A splendid gunfight, when a cell phone ringing ringing around you suddenly, will you be angry? Now the mobile phone is the most important thing in our lives. We carry mobile phones with us, and the problem is coming: mobile phone noise. To this end, we have developed a mobile phone jammer. Cell phone jammers are used in many public places where cell phone ringtones are particularly disturbing. In order to let us get rid of the noise problem in these places, we can turn on the mobile phone jammer. . Another question is, what is a cell phone jammer? Either way, you just need to know that it is some kind of cell phone signal device. It has anti-cell phone signal technology and can turn off all cell phones within a certain working distance.

https://www.perfectjammer.com/wireless-wifi-bluetooth-jammers.html