> For the complete documentation index, see [llms.txt](https://doc.lockerprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.lockerprotocol.com/vault/bitcoin-watch-only.md).

# Bitcoin watch-only (Sparrow / Nunchuk)

Watch your Bitcoin from a desktop wallet without moving the keys.

Desktop Bitcoin wallets like Sparrow and Nunchuk can *watch* an account when you give them its public keys (a *descriptor*). They build transactions; the Vault signs them by QR. No key leaves the Vault.

## What you need

* The Vault, unlocked, with a recovery phrase account.
* Sparrow or Nunchuk on your computer.

{% stepper %}
{% step %}

### Tap "Bitcoin watch-only" on the account page

The Vault shows the descriptor as a QR, and as text you can copy. It contains **public keys only**.

<figure><img src="https://3674012151-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FT2jyfPJ4rcVavAvTU9nL%2Fuploads%2Fgit-blob-fccac1c647fa653b88ff9a1b67693a53ef9a0305%2F01-descriptor-qr.png?alt=media" alt="descriptor qr"><figcaption><p>The descriptor QR, public keys only.</p></figcaption></figure>
{% endstep %}

{% step %}

### Import it in the desktop wallet

In Sparrow: **File → New Wallet → Airgapped Hardware Wallet → Scan QR**, and point the webcam at the Vault. The wallet now shows your Bitcoin balance and can prepare transactions. To send, it displays a PSBT QR that you sign on the Vault's **Sign** tab, then scan the result back.
{% endstep %}
{% endstepper %}

## Learn more

* [Bitcoin review screen](/vault/sign-a-transaction/bitcoin.md)


---

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