... it could actually explain how some of the items do work -- not broadcasting themselves per se, but modulating back-scatter to give a really short range transmission for next to zero power.
http://www.cbc.ca/news/technology/engineers-make-objects-into-fm-radio-stations-1.4013608
That's basically what RFID tags do...or the NSA with your monitor cable: https://upload.wikimedia.org/wikipedia/commons/2/2a/NSA_RAGEMASTER.jpg
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