Well, we wanted you to be able to use your public transportation pass, student card, or office-entry card without having to open your wallet.
That's where the RFID-blocking card comes in.
The Koala-Gear RFID-blocking card blocks everything behind it, and the first card in front of it. So, you can configure your clip in such a way that the card you want to use electronically is first in the stack. Remember to place one card behind it and the Koala-Gear RFID-blocking card.
*Please note that every DJIN comes with its own RFID-blocking card included.