# Specter 2/3 PSBT Multi-Sig
Keystone firmware versions V1.1.1 (BTC-Only) or newer support PSBT Multi-signature functions. Detailed instructions below will explain how to create a 2-out-of-3 PSBT Multi-signature wallet with the Keystone Wallet, Coldcard and a [SeedPicker](http://seedpicker.net/) as 3 participant co-signers. We will use here Specter V1.4.6 as the watch-only coordinator.
## I. **Preparation**
1\. [Firmware](https://keyst.one/firmware?locale=en) version V1.1.1 (BTC-Only) or newer running on Keystone Essential or Pro models. Create recovery phrase A.
(Please read[ How to upgrade firmware](https://support.keyst.one/getting-started/firmware-upgrading) for more details.)
2\. Coldcard upgraded to firmware version V2.1.0 or newer.
3\. run on an offline PC/Mac.
3\. Specter (V1.4.6 or newer) installed and running on PC/Mac.
4\. MicroSD card (≤512GB; default FAT32 format).
{% content-ref url="../../../getting-started/firmware-upgrading/how-to-format-a-microsd-card-to-fat32" %}
[how-to-format-a-microsd-card-to-fat32](https://support.keyst.one/getting-started/firmware-upgrading/how-to-format-a-microsd-card-to-fat32)
{% endcontent-ref %}
## **II. Your devices on Specter**
{% hint style="info" %}
**Tips:** If you want to switch to \[Test Net], please go to Keystone > \[Settings] > \[Blockchain] > \[Test Net]. Then continue with the following steps.
{% endhint %}
### 1. Adding Keystone to Specter
1\) Click \[+ Add new device], select your device type \[Keystone] , then enter the name.
2\) You can add Keystone on Specter by QR code or microSD card.
#### - By QR code
1\) On Keystone: Touch \[Menu] > \[Multisig Wallet] > Press \[•••] icon on the top right > \[Show/ Export XPUB].
2\) On Specter: Click on \[Scan QR Code], then scan the QR code shown on Keystone.
#### - By microSD card
1\) Insert the microSD card into Keystone, then touch \[Menu] > \[Multisig Wallet] > \[Show/ Export XPUB] > \[Export All] > \[Export].
2\) Take out the microSD card from your Keystone and insert it into PC/Mac.
3\) On Specter: Click on \[Upload from SD Card] > Select and open the .json file exported from Keystone.
4\) Click \[Continue] to add Keystone.
### 2. Adding Coldcard on Specter
1\) Click \[+ Add new device] on Specter, then select your device type \[ColdCard] and enter the name.
2\) Insert the microSD card into Coldcard > \[Settings] > \[Multisig Wallets] > \[Export XPUB] > Get xpubs from Coldcard.
3\) Take out the microSD card from your Coldcard and insert it into PC/Mac.
4\) On Specter: Click on \[Upload from SD Card], then select and open the .json file exported from Coldcard.
5\) Click \[Continue] to add Coldcard.
### 3. Adding Paper Wallet on Specter
By using a software-generated paper wallet, you eliminate the need to buy a third hardware wallet (you may later have to buy a hardware wallet if you need to use this key for emergency recovery purposes).
In this tutorial, we chose to use [SeedPicker](http://seedpicker.net/) to generate the third recovery phrase.
{% hint style="warning" %}
**Warning: This is the highest risk step in our multisig setup**. **Follow the instructions closely to drastically improve your security.**
{% endhint %}
1\) Insert the microSD card into your PC/Mac.
2\) [SeedPicker](http://seedpicker.net/) run on an offline PC/Mac, and create a new recovery phrase. Then click \[Download] to save the Xpub of the recovery phrase created by [SeedPicker](http://seedpicker.net/) as a .json file to the microSD card.
3\) Click \[+ Add new device] on specter. Select your device type \[Other] and enter the name. For this tutorial, we will name the device "Paper Wallet".
4\) Click \[Upload from SD Card], then select and open the .json file exported from [SeedPicker](http://seedpicker.net/).
5\) Click \[Continue] to add "Paper Wallet".
## **III. Creating a watch-only wallet for 2/3 PSBT multisig wallet on Specter**
1\. Specter > Click \[Create Multisignature wallet]. Pick the concerning devices \[ColdCard] \[Keystone] \[Paper Wallet] and click \[Continue].
2\. Set the Name, Type and number of needed signatures, then click \[Create wallet].
3\. Create the watch-only wallet for 2/3 PSBT multisig wallet.
## **IV. Importing the 2/3 PSBT multisig wallet to** Keystone
1\. On Specter: Select your multisig wallet (e.g. Bob's Multisig Wallet) > Click on \[Settings] > \[Export] > \[Show Keystone QR Code].
2\. On Keystone: Touch \[Menu] > \[Multisig Wallet] > \[Import Multisig Wallet] > Touch \[Scan] icon > \[Understood] > Check the wallet info and touch \[Confirm] > Import successful.
## V**. Importing the 2/3 PSBT multisig wallet to Coldcard**
1\. Insert the microSD card into PC/Mac.
2\. Click on \[Save ColdCard file] on Specter to save the .txt file to the microSD card.
3\. Take out the microSD card from PC/Mac and insert it into Coldcard.
4\. On Coldcard: \[Settings] > \[Multisig Wallets] > \[Import from SD].
5\. Select .txt file exported from Specter (e.g.Bob's Multisig Wallet) > Confirm(√) and complete the import of the 2/3 multisig wallet.
## VI. **Receiving bitcoin to the 2/3 multisig addresses**
1\. For Keystone, touch \[Addresses] to display the receiving addresses.
2\. On Specter: Select your multisig wallet (e.g. Bob's Multisig Wallet), then click on the \[Receive] tab on the top to display the receiving address.
## **VII. Sending a 2/3 PSBT multisig transaction**
### 1. Creating an unsigned transaction on Specter
1\) On Specter: Select your Multisig Wallet (e.g. Bob's Multisig Wallet) > Click one \[Send] > Input the recipient address and amount > \[Create unsigned transaction].
### 2. Signing with Keystone
**Tips:** You can sign transactions with Keystone by scanning the QR code or by file transfer.
#### - Option 1: Via QR Code
1\) On Specter: Click on \[Keystone] > \[Sign with QR codes] > Specter displays the unsigned transaction data as a QR code format.
2\) On Keystone: Press the \[Scan] icon > Scan the QR code shown on Specter interface > \[Sign] > Password verification. The device will then show the signed transaction data in QR code format.
3\) On Specter: Click on \[Scan signed transaction] > Scan the QR code shown on Keystone > Keystone signed successfully.
{% hint style="info" %}
**Tips:** If you have difficulty on QR code scanning, please tap the QR code to adjust the size of the QR code on Keystone and retry.
{% endhint %}
#### - Option 2: Via File
1\) Insert the microSD card into PC/Mac.
2\) On Specter: Click on \[Keystone] > \[Sign with SD Card file] >\[Save transaction to file ] > \[Save] (save the unsigned transaction file to microSD card).
3\) Take out the microSD card from PC/Mac and insert it into Keystone.
4\) Press the "microSD card" icon > Select and open the unsigned transaction file > \[Sign] > Password verification > press \[touch here...] to partially export the signed transaction file to the microSD card.
5\) Take out the microSD card from your Keystone and insert it into PC/Mac.
6\) On Specter: Click on \[Upload the signed transaction] > Select and open the partially signed transaction file exported from Keystone > Keystone signed successfully.
### 3. Signing with Coldcard
1\) Insert the microSD card into PC/Mac > Specter > \[ColdCard] > \[Sign with SD card file] > \[save transaction to file] > \[Save] (save the unsigned transaction file to the microSD card).
3\) Take out the microSD card from PC/Mac and insert it into your Coldcard.
4\) On Coldcard: \[Ready To Sign] > \[OK] > Export the partially signed transaction file to the microSD card.
5\) Take out the microSD card from your Coldcard and insert it into PC/Mac.
6\) On Specter: Click on \[Load signed transaction] > Select and open the partially signed transaction file exported from Coldcard > Coldcard signed successfully.
### 4. Broadcast transaction on Specter
1\) You can choose to broadcast the multisig transaction immediately or later.
That’s all!
We hope this guide will be useful when you decide to use a 2-out-of-3 multi-sig wallet in the future for protecting your funds in a multi-sig setup!
