Secure Your Bitcoin.
Sleep Like a Baby

[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.

Builder Site

Delivery

Our goal is to allow those who wish to have their orders delivered without having to reveal their personal details.

This is of paramount importance for Bitcoin Bazar, given the various customer data leaks from major players in the sector, which have revealed the names/first names/addresses/and telephone numbers of millions of bitcoin holders to everyone.

Choose delivery directly to the Locker closest to you,
no need to tell us your real first and last names because you collect the package from the Locker, directly via a code received by email.

When paying (prefer Bitcoin over bank card if you want to remain discreet), simply enter a valid email address that you can even create for the occasion, then the Locker closest to you.

On the other hand, if you are going to collect the package from a Relay Point, please provide your real first and last names as you may be asked for proof of identity to collect the package.