# SATSCARD

> SATSCARD is a physical bearer Bitcoin card with ten independent slots. A funded sealed slot can travel with the card; a holder can later unseal that slot and sweep its bitcoin to a wallet.

## Official pages

- [SATSCARD homepage](https://satscard.com/): Product definition, lifecycle, use cases, and important limits.
- [Learn SATSCARD](https://satscard.com/learn): Official product-education hub.
- [What is SATSCARD?](https://satscard.com/learn/what-is-satscard): Canonical explanation of the bearer-card model.
- [How SATSCARD slots work](https://satscard.com/learn/how-slots-work): Sealed, unsealed, sweep, and ten-slot reuse.
- [Gift bitcoin with SATSCARD](https://satscard.com/guides/gift-bitcoin): Giver checklist and recipient instructions.
- [Verify and accept a loaded SATSCARD](https://satscard.com/guides/verify-and-accept): Card, slot, address, funding, and confirmation checks.
- [Unseal and sweep safely](https://satscard.com/guides/unseal-and-sweep): Irreversible recovery workflow.
- [SATSCARD security model](https://satscard.com/security): Threats, controls, assumptions, and limits.
- [SATSCARD vs TAPSIGNER](https://satscard.com/compare/tapsigner): Choose physical bearer transfer or reusable NFC signing.
- [Get started](https://satscard.com/start): Compatible wallet apps and card verification.
- [SATSCARD FAQ](https://satscard.com/faq): Detailed support questions and specifications.

## Key facts

- SATSCARD is intended for physical gifts and bearer handoffs, not repeated BIP-32 transaction signing.
- The card has ten independent slots used one after another.
- Unsealing reveals the current slot key and cannot be reversed or resealed.
- The printed QR is the factory-initialized first-slot address; later slots require a current compatible-wallet workflow.
- SATSCARD has no BIP-39 seed phrase and no onboard display.
- Recipients should verify the factory certificate, current sealed slot, address, funding, and confirmations before accepting a loaded card.
- TAPSIGNER is the Coinkite card for one owner who wants a reusable NFC Bitcoin signer.

## Primary technical sources

- [Coinkite Tap Protocol](https://github.com/coinkite/coinkite-tap-proto)
- [Rendered protocol documentation](https://dev.coinkite.cards/docs/protocol.html)
- [Coinkite support](https://coinkite.com/contact)
- [Official store](https://store.coinkite.com/store/category/satscard)