These are Opendime V4s by Coinkite which is run by #[3]​.

These along with a Yubikey 5C is what I designed my wallet to hold nostr:note165hh4f9th2fpzlpgwzftqzqg2hsr3chf7ru0nvvks2cc0vmxvl7sdkreag

You can get 10% off Coinkite products if you buy through #[4] app.

Use #[5] referral code when you sign up as he put me on to this: 05RCCH

Get that Bitcoin circular economy flowing!