COLDCARD Mk4 Firmware v5.2.1 Released

"Lots of goodies: screen info about transaction level “relative lock-times” (RTL [nLockTime, nSequence]) when signing. Temp Seed import from COLDCARD encrypted backup. Export seed as SeedQR (on screen). Better Passphrase UX & more," said nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8.

https://www.nobsbitcoin.com/coldcard-mk4-firmware-v5-2-1/