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Disruptor Cell Phone Frequencies Jammer

If used for the right purpose, cell phone jammers can definitely be a boon. Chatterboxes who keep talking on the phone, without taking into consideration the nature of their surroundings, can finally be kept quiet. Jammers transmit a high-power signal of the same frequency as that of the cell phone, in a way that both the signals collide and cancel each other out. This is the basic working principle of any jamming device. Simpler devices block only one group of frequencies. Higher-end devices can block all the frequencies simultaneously. Cell phones are full-duplex devices, which means that they use two different frequencies; one for listening and the other for talking. Some basic jammers only block one of these frequencies. And the advanced jamming device not only interferes with all cell phone signals, but also interferes with many other signals. It also has a single frequency switch which can be selected according to the needs.

Most cell phone jammer transmit on the same radio frequency as nearby cell phones, sending a louder, more powerful signal to surrounding towers. So, when a jammer is activated, its signal immediately blocks out all of the other competing signals, with the nearby tower unable to support anything beyond this strong, manufactured signal. In other words, think of the jammer as a loud siren or horn that drowns out every conversation in its proximity. Many countries allow limited cell phone jamming, including France, India, Mexico, New Zealand and others. Nearly all these countries allow the jamming of cell phones in prisons. Some of them allow it in schools, and even theaters. Many countries with current bans are considering the use of jammers in prisons.

All of this would be solved with prison cell phone jammers. There is no reason to not jam prison grounds - guards have walkie talkies that are not affected by jammers (and they shouldn't even have phones on them anyway) so communications would not be interrupted. Jammed airspace can be engineered and tuned as to not effect areas outside the prison. Jammers can be turned off as part of protocol if an emergency is declared and outside emergency agencies need access to the prison.

5 Bands All 2G 3G 4G Cell Phone Jammer Handheld

Handheld 5 Bands Cell Phone Jammer

This is a small multi-function jamming device. It can interfere with major mobile phone signals, such as 2G,3G,4G and other signals, as well as WIFI and GPS signals. Because it is very convenient to carry, it has become a must for most teachers and drivers. Has independent frequency band switch, you can turn on the corresponding frequency band for interference.

$233.90$577.53

Handheld Type Military Camouflage Cell Phone Jammers

6 Bands Cell Phone Blocker

The device is the only one that is currently equipped with an LCD screen. You can clearly observe the data by displaying the screen. It can be more precise. With a single frequency switch button, it is convenient to open or close a frequency band. Has 1 main switch, the No. 1 to No. 6 switches for antennas single control switches, can choose to interfere antennas function individually; the switch with memory function, if device restart, default before function design

$399.99$864.34

16 Bands Power Adjustable Desktop Cell Phone Jammers

High Power Cell Phone Jammers

This product has a very large range to jammer signals, can block all signals within 70 meters, able to meet the needs of the vast majority of situationsa. Suitable for classrooms, auditorium, library, cinema, office space such as a larger place. The jamming signal of this device is very stable and can guarantee the interference effect. This device is arguably the most reliable desktop jamming device of all time.

$990.34$1815.16

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