Coldcard Mk4 — The Security Standard for Bitcoin Self-Custody

Description

The Coldcard Mk4 is the hardware wallet that set the standard for Bitcoin security. Dual secure elements, full air-gap capability, and a decade of security-first engineering from Coinkite.

Why Coldcard Mk4?

• Dual secure elements — Microchip ATECC608 + Maxim DS28C36B
• Multiple connectivity — USB-C, NFC, MicroSD (your choice)
• True air-gap — Never connect to a computer if you don’t want to
• Bitcoin-only — No altcoin distractions or attack surface
• Open-source firmware — Verify everything
• 120 MHz CPU — Fast operations

Security Features:

• Trick PINs — Duress wallet, brick device, countdown delays
• Virtual disk mode — Drag-and-drop file transfers
• Unlimited transaction size — No PSBT restrictions
• Secure supply chain — Tamper-evident numbered bag
• Made in Canada — Lovingly soldered in Toronto

What’s Included:

• Coldcard Mk4 device
• USB-C cable
• MicroSD card
• Quick start guide
• Tamper-evident numbered bag

The choice of serious Bitcoiners since 2018.