can be installed in a vehicle. It allows GPS useless in some confidential within the company needs is a very important significance.
is illegal in some countries supplies, only in some government units or special units for use, please note that check whether they belong to such persons.
Who knows how can signal jammers to sell?
This site has Signal Jammer
, but you need to have legal procedures.
can support multi-band signal shielding, and some GPS JAMMER can shield mobile phone signals.