[icebraining]

How does that work? Can the checkout machine read the tags inside the bag? I'd prefer if my groceries didn't advertise themselves as I walk down the street.

[ank9]

Checkout machines will have RFID readers. When you place your bag inside RFID reader, all tags will be read.

UHF based RFID readers are better since they have more than 1 meter of read range.