This is how it works as published by Mashable. RFID technology, near-field communications, and an electronic paper display from E Ink are incorporated in Vanguard’s plastic device. A traveler can use a phone app to code the tag with a destination. Example — CDG for Paris, ORD for Chicago’s O’Hare — and display it on the tag. Then the bag’s location is transmitted by the RFID chip. Richard Wartham, CEO of Vanguard ID Systems, says “The idea is that a guy has to be able to change his tag in the cab on the way to the airport,” The displays works with the current handheld baggage scanners that airlines use. “It scans as good as paper,” he adds.