Foundation Passport Core Stealth — Air-Gapped Bitcoin Wallet

This is a sought-after and discontinued hardware wallet that is air-gapped with open-source code. It supports multisig, passphrase wallets, PSBT signing, and encrypted backups. We do not recommend it for generating your seedphrases – we encourage self-generated entropy with die. Bitcoin only.

Passport Core never plugs into your computer, never touches Wi-Fi, and never pairs over Bluetooth. The only ways in or out are a camera reading QR codes and a microSD card. Every schematic and every line of firmware is published, so you’re not taking anyone’s word for it.

You create a transaction in your software wallet, send it across as a QR code, review and sign it offline, then send it back the same way. The USB-C port is wired for power only — no data line at all — so charging can never open a path onto the device.

Inside, a Microchip ATECC608-series secure element isolates your keys and lets you verify on first power-up that your unit is genuine. The body is a soft-touch shell over a die-cast zinc alloy core: compact, pocketable, with real weight to it. PIN, passphrase, and seed entry all happen on the device’s own keypad and screen. The battery is removable and standard phone format.

Compatable as a signing device with BlueWallet, Sparrow, Specter, Nunchuk, Electrum, BTCPay Server, Bitcoin Core via HWI, and more. It also can be used with Foundation’s Envoy app.

We recommend deep cold storage on physical backup only, with a hardware wallet used as a signing device for travel and everyday spending.

Specifications

Security

• Microchip ATECC608-series secure element for key isolation
• (NovaSapien does not recommend this option) Hardware avalanche noise source plus multiple independent entropy sources for seed generation
• On-device supply-chain validation to confirm your unit is genuine
• PIN, passphrase (25th word), and encrypted backup support

Connectivity / Air-Gap

• Camera-based QR code scanning for signing transactions
• microSD card slot (firmware updates and optional file-based signing)
• USB-C port — power only, no data pins
• No Bluetooth, no Wi-Fi, no wireless radios of any kind

Power

• Removable, standard phone-format rechargeable lithium-ion battery (1200 mAh)
• Charges over USB-C
• Battery accessed via a magnetic rear cover

Design & Build

• Soft-touch plastic shell over a die-cast, copper-plated zinc alloy frame
• Full alphanumeric keypad plus physical navigation controls
• Dedicated power button
• Dimensions: approx. 39 x 110.8 x 19.2 mm (1.54 x 4.36 x 0.76 in)
• Weight: approx. 120 g (4.2 oz)
• Colorways: Classic, Stealth

Software & Compatibility

• Companion app: Envoy (iOS and Android), free and open source, with optional Tor and run-your-own-node support
• Compatible with Sparrow, Specter, Nunchuk, Electrum, BlueWallet, BTCPay Server, Casa, and Bitcoin Core (via HWI)
• Multisig, PSBT, testnet, and SeedQR import/export support
• Bitcoin-only — no altcoin support

Open Source

• Hardware licensed under CERN-OHL-S v2
• Firmware licensed under GPLv3
• Designed and assembled in the USA

In the Box

• Passport Core device
• USB-C charging cable
• microSD card
• Getting started guide
• Tamper-evident packaging with unique security seal

Take the first step toward unlocking your true potential. Whether you’re looking to build your skills, enhance your knowledge, or create a secure future, this is your opportunity to start making a lasting impact today.