Keystone 3 Pro

The Keystone 3 Pro is an open-source, air-gapped hardware wallet designed to secure cryptocurrency assets using advanced security features such as three separate secure element chips, biometric authentication, and tamper protection that wipes data if tampered with.

It supports QR code and MicroSD card-based offline data transfer, is fully compatible with MetaMask and major non-EVM blockchains, and allows management of up to three separate seed phrases on a 4-inch touchscreen interface.

Keystone, originally launched as Cobo Vault in 2017 and rebranded in 2021, emphasizes transparency by making its hardware and software code publicly auditable, catering to crypto investors seeking robust, user-friendly self-custody solutions.