Tips about RFID

On a recent trip I discovered that the new "Touch and Go" Key to the World cards (RFID) will work while in a lanyard pouch. However, if you have more than one of the new types of cards together in a pouch or hold them together, the sensors pick up both chips and cannot tell which is which. The cards work if you hold them up to the sensors one at a time, they just cannot be stacked together. - Mark