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Originally Posted by W9ZEB  For what it's worth, RFID tags have no power source. The transmitters inside of them only activate when a receiver, which is also a transmitter provides enough RF to power the tiny transmitter inside the tag.
An RFID scanner that would work at a range of more than a few feet (read 6' or under) would require a substantial power source, a substantial amount of RF, and would not be safe to work around for any extended period of time. |
The thing is, cell phones, steel toe shoes/boots and many other things can set the alarm off. The alarm has also been set off when people ENTERED the store. Why? Who knows.