a 'shortwave' radio/receiver
(..) -Do you believe it? MAN : All right. Strap it tight. WOMAN: The signal has to be continuous. If there's any interruption.... JOHN : Okay. Let's rig up a portable shortwave, I need to test it on something larger in the field. All right. Destroy this thing. MARCUS: So where are the cars? KYLE: (..)2009 Terminator Salvation
(..) Because my men died down in that hole. What did we find down there? We found a solution, Connor, that can end this war once and for all. We know the machines use shortwave transmitters to communicate. Our Intel has located a hidden signal under the primary channel. It allows for direct control (..)2009 Terminator Salvation