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Thanks to both of you for responding to my question
and comment. Yes, the window sticker is for a car's
winshield to use on a tollway here in Houston. The
instruction sheet says that this EZ-tag is of the 2nd
generation and does not require a battery. (I know
of the chips put under the skin of pets and have
heard of some programs on late night radio that tell
about RFID chips that are used in stores and other
data gathering.) Maybe the 3rd generation chips will
be super small and be as big as this dot. (I'm not
worried about being tracked......just curious about
how the things work.)
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