Mobile phone signal jammer circuit - gps signal blocker jammer headphones

Mobile phone signal jammer circuit,gps signal blocker jammer headphones,Basic Info Model NO.: CPJ3050 Weight: 0.6kg 2ggsm850MHz: 851-894MHz 2ggsm900MHz: 925-960MHz 2gdcs1800MHz: 1805-1880MHz 2gpcs1900MHz: 1920-1990MHz 3G2100MHz: 2110-2170MHz ...