Skip to content

Mk5 Compared to Mk4#

See the Mk5 product page for more!

The Mk5 COLDCARD® is the latest evolution in the Mk line of COLDCARD Bitcoin hardware signing devices.

The Mk5 builds on the trusted, battle-tested security core of the COLDCARD with a redesigned user experience focused on durability, visibility, and modern convenience.

Get ready to upgrade your self-custody, cold storage solution!

Don't worry about your investment in the Mk4, because it runs the exact same firmware and will get all the same updates as the Mk5 going forward.

Mk5 Highlights#

  • New screen: new 1.54-inch display protected by Gorilla Glass for maximum durability and significantly improved clarity.
  • New keypad: completely redesigned keypad with precise, tactile keys for more reliable and confident PIN entry.
  • USB-C port is now located on the bottom of the device, improving ergonomics and ease of access when the unit is powered on a desk.
  • Improved NFC performance, now faster and more reliable (tap in top-right corner).
  • Tougher case: upgraded with new plastic and cleaner edges.

Unchanged#

  • runs exactly the same firmware image as Mk4.
  • Unlimited memory: no Bitcoin transaction size restrictions!
  • Expanded multisig capabilities: handle bigger, more complex transactions.
  • NFC-V compatible: tap to transmit all data types, including PSBTs, addresses, and XPUBs.
  • Protective sliding cover shields screen and keypad when not in use.
  • Two Secure Elements for more security:
    • Many new and extensive duress PIN options (Trick PINs)
    • Two Secure Elements, two manufacturers; minimizes unknown vulnerability risks.
  • USB Virtual Disk Mode: emulates a 4MB disk when connected to macOS, Windows, iPhone, etc.
  • Same fast processor and substantially higher memory capacity.
  • Compare the Mk4 to older Mk3.