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Someone told me that he needed to block some of the signal, I recommend this site (Mobile Jammer) to him, and I hope to help him
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.
Signal blocker in public places is illegal. However, if there are government documents permitting you can use.
Cell phone jammer in the use of very simple, only need to install the corresponding antenna, turn on the switch can shield mobile phone signals corresponding to it.
What makes these voyeurism so rampant everywhere wireless camera, my privacy, my God. I know there is this Wifi Jammer sell.