COLDCARD Mk4

Name: COLDCARD Mk4
Brand: COLDCARD
Price: 3499.00 ZAR
Availability: InStock

R3,499.00

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2 year manufacturer warranty

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Coldcard Mk4

The Coldcard Mk4 is an ultra-secure Bitcoin-only hardware wallet designed for users who prioritise maximum self-custody with a truly air-gapped workflow. Built around a dual-secure-element architecture, the device stores private keys in dedicated security chips rather than the main processor, reducing attack surface and enhancing secrecy. It features a bright OLED screen and a tactile numeric keypad to confirm all details offline, along with NFC and USB-C connectivity for transaction transfer. With features such as sliding protective cover, advanced anti-phishing PIN routines and true offline signing via microSD, the Mk4 delivers one of the strongest security foundations for Bitcoin self-storage available today.

Security & Protection

Dual secure element chips from independent vendors to isolate and protect private keys
True air-gapped signing using microSD (“SneakerNET”) with no required USB connection
PIN protection with advanced anti-phishing words and duress PIN options
Tamper-evident packaging and supply chain checks
Fully offline verification of all transactions on device before signing

Display & User Experience

Bright OLED screen for clear transaction detail and address review
Full numeric keypad for secure PIN entry and navigation
Sliding protective cover for added physical security
Purpose-built interface focused on transaction clarity and security

Connectivity & Compatibility

USB-C port for power and optional data connection
NFC-V support for near-field PSBT transfer and address reading
MicroSD card for fully offline transaction signing and PSBT transfer
Works with Bitcoin wallet software that supports PSBT (partially signed Bitcoin transactions)
Compatible with common desktop wallet setups that support PSBT workflows

Asset Support & Functionality

Bitcoin-only hardware wallet optimized for self-custody
Deterministic backups and encrypted storage for backup files
Multi-signature support for advanced custody setups
Virtual disk mode for drag-and-drop PSBT workflow
Security-focused onboarding and verification tools

Whats in the box?

Tamper-evident packaging with security verification

1 hardware wallet

Start-up guide

COLDCARD Mk4

Coldcard Mk4

Whats in the box?

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