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School exams
There are currently two types of signal jammer housings on the market: the first uses a metal housing, and the second uses a plastic housing. Usually a metal case is used for the outside and a plastic case is used for the inside.

Informations List

Effects of signal jammer radiation on students

The use of cell phones has spread widely and rapidly over the past few decades.

High power signal jammer overheating problem

A mobile phone jammer is a high-power, high-current device.

Newsletter cheats and signal jammers

There is a kind of bad signal, called the two days of the American College Test. 

Will Cell phone jammer affect people's health?

According to rumors, a cell phone jammer with signal jamming function will be installed and used in examination rooms in many parts of the country.

Reduce Uncontrolled Cell Phone Use With Cell Phone Jammers

Smart devices have brought us a lot of joy, and these benefits have played an important role in our lives and enriched our lives.

Eliminate annoying phone noises without being noticed

In the information age, electronic devices such as mobile phones have become an indispensable part of people's daily life.

GPS jammers basically block all unwanted signals

GPS jammers were originally created by governments for military organizations and spy agencies.

Signal Jammer Information

Perfectjammer is the most professional jammer information website. We have collected information on signal shielding devices in different frequency bands, just to give users a more detailed and professional information platform.