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Small electronic device with a screen and keypad, with a orange card inside
  • Small electronic device with a screen and keypad, with a orange card inside
  • Hand holding a transparent electronic device with black buttons and an orange 'OK' button on a black background
  • Keycard Shell
  • Keycard Shell
  • Keycard Shell
  • Keycard Shell
  • Small electronic device with a screen and keypad, with a orange card inside
  • Hand holding a transparent electronic device with black buttons and an orange 'OK' button on a black background
  • Keycard Shell
  • Keycard Shell
  • Keycard Shell
  • Keycard Shell
Keycard Shell

Keycard Shell

€99,00 €149,00

Radically open. Uniquely secure.

Slide any Keycard into Shell and get an air-gapped device with display, QR camera, and replaceable battery.

No radio attacks, no closed-source mystery. Everything from the PCB to the firmware lives on GitHub under the MIT license.

Learn more at: get.keycard.tech/pages/keycard-shell

Stand-out features

Feature Why it matters
Secure signing inside the card Private keys never leave the secure element - ever.
100 % open-source hardware & software Crowd-audited transparency; fork or verify at will.
Duress PIN Enter a decoy PIN to show a fake wallet under coercion.
Unlimited cards One Shell, infinite Keycards - perfect for multi-sig, backups, family wallets.
Replaceable battery & USB-kill-switch Long life, full air-gap when you need it.

Bundle: includes 2 Keycards
Pre-order price: €99 excl. VAT (discount applies at checkout) | Ships: December 2025

Reserve yours now and unlock exclusive launch perks.

How to Shell

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