And another post on SN for this Tweet: 

*Its time to show off [@Coinkite](https://Twitter.com/Coinkite)’s newest [@COLDCARDwallet](https://Twitter.com/COLDCARDwallet), the Mk4 🔥🔥🔥 In this quick video tutorial, I go through the process of extracting a wallet address from the hardware device onto a mobile phone. Take a look! 👀*
https://stacker.news/items/20362
https://twitter.com/eh_deee/status/1507820692401709057

cryptocoin

bitcoin

Coldcard Mk4 - NFC demo

UlfMoby

Here's another post on SN for the Mk4:

*🎥 Demonstration of transferring data from NFC-equipped COLDCARD wallet MK4 to mobile | [@econoalchemist](https://Twitter.com/econoalchemist)*
https://stacker.news/items/16477
https://twitter.com/econoalchemist/status/1507746564994863105