What is GPS jammer? It is a GPS signal blocking devices, from the principle that is to send GPS Jammer and GPS signal wave signal wave overlap itself so that the original wave frequency to change the way to block the signal.
According to the British National Bureau of Statistics, the world every 10 electronic products, there are eight products from China. GPS jammer is also one of China's major export products.
mobile phone jammer used in schools should be legalized because it can contribute to student learning and exam fairness.
In some places sell desktop gsm jammer, they are wider, more power, and some can even reach a few kilometers
Some people may ask, I want to know how I blocked out those harassing phone ring tones, which is too tired, this time you need a Mobile Phone Blocker
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gps jammer can support multi-band signal shielding, and some GPS JAMMER can shield mobile phone signals.