Radio frequency identification (RFID) is a technology that uses communication via electromagnetic waves to exchange data between a terminal and an electronic tag attached to an object for the purpose of identification and tracking. The RFID Passport Sleeve prevents electronic pick-pocketing. Sleek silver design slides into your card wallet with ease. Neutral and inconspicuous design. A very thoughtful present to family and friends, also a great gift for company promotions! Prevent your credit card information from being stolen and buy yours today!