gps singal shield 1-10M,Operating frequency:1600MHz(GPS) Effective coverage of 1 - 10m Weight about 180 g gps singal shield ,gps signal singal shield gsp isolator gps singal shield ,Shielding distance:1-10M,Operating frequency:1600MHz(GPS) Product details1, effective guard against GPS satellite positioning tracking! 2, effective jamming GPS satellite signal your whereabouts to protect privacy and ...