Cell phone blocker
to block the 3G 4G mobile phone signal similar, in the process of buying, we should note that we need to distinguish the type of signal blocking.
I have a Cell phone jammer
at this site to buy, good quality, our country also allows us to use this government units.
It is illegal for any US citizen to use or sell a cell phone jammer
We often receive military orders, are used to shield the phone bombs, as a good cell phone jammer
factory, we need to ensure quality.
Knowledge: the signal is actually encrypted transmission of electromagnetic waves, the signal peaks and troughs on behalf of 1,0. cell phone jammer
play a superposition of waves, resulting in the shielding effect.