car use gps jammer, anti spy toy and gps gsm tracking device (GPM3)
A GPS JAMMER IS DESIGNED FOR GUARD AGAINST GPS SATELLITE POSIONING TRACKING.
IT DOES NOT INTERVENE WITH ANY COMMUNICATIONS OTHER THAN GPS WITHIN DEFINED WORKING AREA. UPON ACTIVATING A GPS JAMMER, THE DEFINED REGULATED ZONE WILL DISAPPEAR FROM ... - Update: 2007-08-16