If you are a #bitcoiner first device you have to buy / build with no doubts is @SeedSigner
More info in their site:
#seedsigner #plebchain #nostr
SeedSigner: Air-gapped DIY Bitcoin Signing Device
SeedSigner: Air-gapped DIY Bitcoin Signing Device
BUILD YOUR OWN BITCOIN SIGNING DEVICE using a raspberry pi zero (VERSION 1.3) You can build an offline, air-gapped Bitcoin transaction signing devi...