Transmits high power radio signals to cut-off communications between cell phone and cellular base-stations. It does not interfere with any communications other than cellular within the defined regulated zone.Upon activating Phone Jammer, all idle phones will indicate "NO SERVICE". Incoming calls are blocked as if the cellular hand phone is OFF.When Phone Jammer, is turned off, all cell hand phones will automatically re-establish communications and provide full service.

Note: Always connect matching antennas before using the cell phone mobile jammer to avoid any damage