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name: bitcoin-hardware-keystone description: | Keystone 3 Pro: airgap HW wallet with QR + microSD, color touchscreen, multi-currency support, fingerprint auth. USE WHEN: integrating Keystone, evaluating mid-priced HW options. allowed-tools: Read, Grep, Glob

Keystone 3 Pro

QR-based airgap hardware wallet by Keystone (formerly Cobo Vault). The product name is "Keystone 3 Pro", not "Keystone Pro 3". As of September 2026 the line is: Keystone 3 Pro (plus co-branded and NFT-customized variants of the same hardware), the Keystone Tablet / Tablet Plus steel seed backups, and ForgeBox, a build-it-yourself developer board.

Hardware

• 4-inch color touchscreen.
• Battery-powered.
• Three secure element chips; seed phrases and fingerprint data live in separate chips.
• PCI-grade anti-tamper: disassembly is detected and wipes the device (self-destruct), so the secure elements are not a user-removable module.
• Fingerprint sensor.
• Camera for QR scanning.
• microSD slot.

Connectivity

• No USB / Bluetooth for signing. QR + microSD only.
• USB only for charging + firmware updates.

Firmware editions

Same hardware, three firmware builds, cross-upgradable at or above the installed version. Versions as of September 2026:

Edition	Latest	Scope
Multi-coin	3.0.8 (Sep 2026)	BTC + 5,500+ assets
Bitcoin-only	3.0.4-BTC (Aug 2026)	Bitcoin only
Cypherpunk	3.0.4-CYPHERPUNK (Aug 2026)	BTC, ZEC, XMR

Devices ship on multi-coin; flash Bitcoin-only to drop the altcoin parsers.

Currencies

Multi-coin firmware: Bitcoin, Ethereum, Cosmos, Solana, etc. Bitcoin-focused features:

• BIP39 seed.
• BIP44/49/84/86.
• Multisig support.
• PSBT signing.

Backup

• 24-word seed.
• Encrypted microSD backup.
• Optional Shamir Backup (SLIP-39).

Compatible wallets

• Sparrow.
• BlueWallet.
• Nunchuk.
• BitMask.
• Keystone Nexus, the vendor companion app (the "Companion app" branding was retired; keyst.one/companion-app now redirects to the home page, as of September 2026).

Compared to other airgap options

Aspect	Keystone 3 Pro	Coldcard Q	Passport
Touchscreen	Yes	Yes	Yes
Multi-coin	Yes (BTC-only build exists)	BTC only	BTC only
Fingerprint	Yes	No	No
Price	Mid	High	High
Open-source firmware	Partial	Partial	Yes

Limitations

• Multi-coin = more attack surface than BTC-only; mitigated by flashing the Bitcoin-only firmware edition.
• Open-source partial — some components closed.

See also

• passport/SKILL.md
• coldcard/SKILL.md
• jade/SKILL.md