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To: Paladin2
Farady invented a lock box for these.

They're data recorders, not transmitters.

5 posted on 10/30/2013 9:11:44 AM PDT by grobdriver
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To: grobdriver
These days they are likely working with GPS signals.

I have an EZPass that likes to be interrogated when not in its box.

6 posted on 10/30/2013 9:15:28 AM PDT by Paladin2
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