Coldcard Mk4
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AI Summary
Last updated Oct 29, 2026Designed for secure cryptocurrency storage, the Coldcard Mk4 is a hardware wallet that keeps private keys offline. This method of key management enhances security against online threats, making it suitable for users focused on safeguarding their digital assets.
The Coldcard Mk4 was released on October 5, 2022. It supports a single cryptocurrency and employs cold storage to protect users' private keys.
The Coldcard series is developed by Coinkite, a company known for its focus on security and privacy in the cryptocurrency landscape. The Mk4 builds upon previous models, incorporating user feedback to improve functionality while maintaining a commitment to robust security features.
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Login- Width
- 52 mm
- Height
- 10 mm
- Weight
- 30 g
- Length
- 88 mm
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Frequently asked questions
What is Coldcard Mk4?
Coldcard Mk4 is a hardware wallet / cold wallet with a compact credit-card-sized form factor (≈ 88 × 52 × 10 mm with cover). Coldcard Mk4 supports USB-C connectivity, optional NFC tap, MicroSD file transfers, and is strictly Bitcoin-only.
Is Coldcard Mk4 safe & legit?
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