this is what I found on the disney Help page. I was looking up RFID Disney on a google page, to see how invasive the rfid technology is and found this.
Each MagicBand contains an HF Radio Frequency device and a transmitter which sends and receives RF signals through a small antenna inside the MagicBand and enables it to be detected at short-range touch points throughout Walt Disney World Resort.
MagicBands can also be read by long-range readers located at Walt Disney World Resort used to deliver personalized experiences, as well as provide information that helps us improve the overall experience in our parks.
If you prefer,
you may elect to use a card instead of a MagicBand. Cards contain a passive HF Radio Frequency chip and cannot be detected by the long-range readers.
https://disneyworld.disney.go.com/faq/my-disney-experience/frequency-technology/
I gotta say, I am uneasy about this. I realize a lot of people will disagree with this, but I don't want Disney or any one else knowing if I'm walking clockwise or counter clockwise. It is no ones business if I go to the washroom or how long I spend in it. I really don't want every move I make to be tracked. I'm all for security, and the cameras and other methods they use are ok with me, but this rfid info is not used for security. It is used to trace traffic patterns and the flow of crowds. I'm sure they think it is ok, but Big Brother is watching, and I don't like it. Since the card does not have the long range capability that the band does, I would much rather get the card, and it says on their own website that I can have this option.