new 12v/24v car gps signal interference shield privacy protection positioning anti tracking stalking for auto vehicles, Silver

1.shield gps signal band with a total transmitting power of 0.8w, effectively prevent your car from being tracked by gps, and protect your whereabouts privacy. 2.effectively shielding distance ranges from 1 to 15 meters, which can be adjusted according to customers' requirement. 3.easy to use and low power to consume, no harmful to human body and environment. 4.small size and lightweight to conveniently carry.