> 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/start-here/what-you-need.md).

# What you need

An old phone or tablet with a camera, a computer with a browser, and ten minutes.

## 1. A device for the Vault

Any smartphone or tablet with a **working camera**. It does not need to be new or fast. An old phone in a drawer is perfect.

* iPhone or iPad (Safari) or Android (Chrome).
* It must be able to go online **once**, to install the Vault. After that, it stays in airplane mode forever.
* Do not use your everyday phone. The whole point is that this device never goes online again.

{% hint style="info" %}
**Think of it as a safe.** You would not carry your safe around town. Pick a device that can stay at home, offline.
{% endhint %}

## 2. A computer with a browser

* Chrome, Edge, Brave, Firefox or Safari.
* A **webcam**, so the extension can read the Vault's screen. A laptop's built-in camera is fine.

## 3. Paper and a pen

When you create an account, the Vault gives you a **secret phrase** of 12 or 24 words. You write it on paper. Never in a photo, never in a note on your phone.

## 4. About ten minutes

Installing the Vault, creating an account and connecting the extension takes about ten minutes the first time.

{% hint style="warning" %}
**Do not use your main phone as the Vault.** A phone that goes online is not air-gapped, and the safety of Locker Protocol depends on the Vault never going online.
{% endhint %}

## Learn more

* [Set up in 3 steps](/start-here/set-up-in-3-steps.md)
* [Install the Vault](/vault/install.md)


---

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