Teachers in the school have the right to use Signal Jammer
, so we can not use the phone when the class, this is too make people mad.
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.
Phone signal is not really the radiation, I think cell phone signal jammer
can give you the answer, you try to know, huh.