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Keystone 3 Pro

Keystone 3 Pro

100% Air-gapped Hardware Wallet

Keystone 3 Pro is an air-gapped cold wallet that uses 3 PCI security chips to manage Bitcoin and other crypto assets offline. It employs QR codes and Micro SD cards for offline data transfer, significantly reducing vulnerability to cyberattacks, with a smartphone-like interface for ease of use.

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Keystone 3 Pro hardware wallet front and back
Keystone 3 Pro connected with MetaMask wallet
Keystone 3 Pro customization with NFT lockscreen
Description

Keystone 3 Pro is a 100% air-gapped hardware wallet designed to secure Bitcoin, Ethereum, and other crypto assets with maximum protection against online threats.

Security Architecture

  • Triple Secure Element Chips — Equipped with 3 independent security chips, the Keystone 3 Pro sets a new standard for hardware wallet security by isolating multiple crypto accounts from each other.
  • 100% Open Source — Both firmware and software are fully open source, allowing independent security researchers to audit the code and verify its integrity.
  • Anti-Tamper Self-Destruction — The device detects physical tampering attempts and automatically wipes sensitive data to protect your private keys.
  • Air-Gapped QR Code Communication — Transactions are signed completely offline. Data is transferred via QR codes, eliminating all USB, Bluetooth, and Wi-Fi attack vectors.

Key Features

  • 4-Inch Color Touchscreen — Full transaction details displayed on a large, smartphone-like screen for easy verification before signing.
  • Fingerprint Authentication & Passphrase — Biometric unlock combined with BIP39 passphrase support for layered security.
  • Shamir Backup (SLIP-39) — Split your seed phrase into multiple shares and configure custom recovery thresholds for distributed backup.
  • Multi-Wallet Support — Manage up to 3 separate wallets on a single device, each with its own seed and passphrase.
  • NFT Lockscreen — Personalize your device with custom NFT or image lock screens.

Supported Assets & Integrations

Compatible with MetaMask, OKX Web3 Wallet, Solflare, and other major wallets via QR code. Supports Bitcoin, Ethereum, Solana, and thousands of other assets across multiple blockchains.

Highlights

Pros

  • Fully open-source firmware and software for independent security auditing.
  • Fully air-gapped with QR code communication eliminates USB, Bluetooth, and Wi-Fi attack vectors.
  • Large 4-inch color touchscreen provides a smartphone-like experience for easy transaction verification.
  • Supports Shamir Backup (SLIP-39) for distributed seed phrase recovery.
  • Three independent secure element chips isolate multiple crypto accounts from each other for layered protection.

Cons

  • No Bluetooth or USB data connectivity limits convenience for less technical users.
  • Higher price point compared to many single-chip hardware wallets.
  • Requires QR code scanning which can be slower than direct cable connections.