Actually they are super cheap keycard.tech also ships them for free - you don’t need nfc, you can use a standard cheap smart card reader!
Discussion
Interesting. It includes a chip reader too and is really cheap.
I think this would be a reasonable choice for the recovery signer in a 2 of 3 multisig, as long as the chip card is pin protected.
Yes it’s pin protected and with the card I’m working on its PIN and/or fingerprint will share details check my post or here https://youtube.com/shorts/xVel1zzx2Y8?si=d7283oJxv1ErtnQR