Secure Your Bitcoin.
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[Only Bitcoin]

General Description:

The Coldcard Mk4 is an ultra-secure Bitcoin hardware wallet, designed to provide maximum protection while being accessible. It stands out for its advanced security features and simple interface, ideal for Bitcoin users looking to protect their funds.

Technical characteristics:

• Display : 3128x64 pixel OLED screen, offering good readability.
• Keyboard : Numeric keypad for quick PIN code entry.
• Connectivity :
  • NFC : Secure data transmission with compatible devices.
  • USB-C : Standard connection for data transfer and power supply.
  • AirGap SneakerNET : Maximum security thanks to completely offline data transfer.
• Power : Works via USB-C cable, compatible with power banks or AC adapters.
• Memory : Double Secure Elements (Microchip ATECC608B and Maxim DS28C36B) for secure storage of private keys.

Security and Advanced Features:

• Double Secure Element : Protection of private keys with two security chips from different suppliers.
• Anti-phishing PIN : Two-part PIN with anti-phishing words for protection against attacks.
• Sliding Cover : Design inspired by classic calculators, protecting the screen and preventing hardware implants.
• Customized Security Features : Includes “Duress PIN”, “Countdown to Brick”, and “Brick Me PIN” for enhanced security in threat situations.
• Air-Gapped Operation : Complete offline use, reducing the risk of remote hacking.

Use and Ergonomics:

• User Interface : Simple and intuitive, facilitating configuration and daily use.
• Physical Protection : Transparent casing allowing hardware integrity to be verified.
• Bitcoin Seed Generation by Dice : Ability to generate BIP39 recovery phrase with dice for added security.

Recommended Applications:

The Coldcard Mk4 is ideal for Bitcoin users looking for institutional-grade security at an affordable price. It is particularly suitable for large fund management, multi-signature wallets, and anyone concerned about protecting their assets from physical and software threats.

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