Coldcard MK4
The Coldcard Mk4 is an ultra-secure Bitcoin hardware wallet designed for maximum self-custody and offline protection. Featuring a secure element chip, air-gapped transactions, and PSBT (Partially Signed Bitcoin Transactions) support. It ensures private key safety even in hostile environments. With MicroSD backup, duress PINs, and anti-phishing words, the Coldcard Mk4 is ideal for Bitcoiners who prioritize security, privacy, and control over their funds.
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Coldcard MK4
This is an easy to use open source and ultra-secure hardware wallet that is easy to backup through a MicroSD card. The hardware wallet provides a strong resistance against online threats like viruses and hacking since no software can be installed on it.
PRODUCT FEATURES
Connectivity
Transactions can be signed using the MicroSD card, USB-C Cable, and the newly introduced NFC capability. It allows you to sign a transaction by just tapping the main button area of the hardware wallet.
Hardware wallet support
The coldcard MK4 supports bitcoin firmware only. It also supports displaying information such as an address received for the user to verify.
Dual Secure Element
The coldcard uses two secure elements from different vendors in order to protect your Bitcoin.
Push Transactions
The push transaction allows users to single-tap broadcast of transactions that had just been newly signed from coldcard to a phone.
