Where can I buy the RFID key fob?

How the RFID Key Fob is sent?

How do I register the RFID Key Fob?

Is the RFID Key Fob necessary?

Can I have two or more RFID Key Fobs?

My RFID Key Fob is not working?

What do I do if my RFID Key Fob has been lost or stolen?