COLDCARD Mk4
$157.94
COLDCARD Mk4 with upgraded secure elements, USB-C connector, new plastic, optional NFC, massive RAM for multisig, and much-much more.
Dual secure element. For exceedingly strong physical security, your seed words are stored in specialized chips, designed solely to securely store secrets. Now dual-vendor!
Verifiable source code. All of the Coldcard code is viewable, editable, and verifiable. You can compile it yourself.
True air-gap. Cold Card provides you with the option to avoid ever connecting the device to a computer for its full life cycle, from seed generation to transaction signing. Uses PSBT (BIP174) natively!
