Settings Menu

Video: Settings Overview

The COLDCARD^® Settings Menu provides comprehensive controls for customizing your device’s functionality and security. It allows you to manage login preferences, hardware settings, wallet configurations, and more, ensuring you can tailor the device to your specific needs.

The menu options shown are current as of firmware v5.3.3 for Mk4 and v1.2.3Q for Q.

The Login Settings Menu allows you to customize and secure your device's access features. It contains settings that affect the PIN code, startup behavior, and trick/duress options.

Login Settings Menu

Video: Login Settings Overview

Change Main PIN#

This option changes the PIN you use to unlock your COLDCARD, both prefix and suffix. Since the Main PIN affects your anti-phishing words, changing your PIN also changes your anti-phishing words.

Backup Your PIN

If you've forgotten your PIN, we can't help you! Even if you gave us your COLDCARD and we put all our resources into it, we couldn't crack or break the COLDCARD to get the seed out without the PIN.

What happens when I can't remember my PIN?

Video: Mk4 Change Main PIN

Video: Q Change Main PIN

Steps to Change the Main PIN

1. Select Change Main PIN from the Login Settings Menu.

2. Press OK/ENTER after reading the warning screen.

3. Use your current Main PIN to complete the typical login process.

4. Enter your new Main PIN prefix and write down your new anti-phishing words.

5. Enter your new Main PIN suffix.

6. Confirm your new Main PIN by repeating the login process.

7. Your COLDCARD will save and verify the change and return to the Login Settings Menu.
Trick PINs#

Trick PINs are a security feature that allow you to enter a PIN other than your Main PIN, and are configured to trigger specific actions including: bricking the device, wiping the seed, or opening a duress wallet.

You can have many Trick PINs on the COLDCARD, with each one performing unique actions.

COLDCARD Guide: Trick PINs

Video: Trick PINs Overview
- Add New Trick#
  
  This will create a new Trick PIN and configure what the COLDCARD does when it is entered.
  
  1. Select Add New Trick from the Trick PINs Menu.
  
  2. Enter the Trick PIN prefix and take note of the anti-phishing words.
  
  3. Enter the Trick PIN suffix.
  
  4. Choose the action(s) performed when entering this Trick PIN in place of your Main PIN:
  New Trick PIN Menu#
  
  Brick Self#
  
  Video: Proper COLDCARD Disposal
  
  The COLDCARD becomes completely useless, and will only display the word Bricked forever.
  
  Be careful with bricking the COLDCARD!
  
  The destruction process is quick and irreversible. You cannot reuse a bricked COLDCARD; discard it as e-waste.
  
  Wipe Seed#
  
  Wipe the seed and maybe do more. These are the options:
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Wipe & Reboot#
  
  The seed is wiped, and the COLDCARD reboots without any notice.
  
  Silent Wipe#
  
  The seed is silently wiped, and the COLDCARD acts as if the PIN was just entered incorrectly.
  
  Wipe -> Wallet#
  
  The seed is silently wiped, and the COLDCARD logs into one of the following duress wallets:
  
  BIP-85 Wallet #1
  
  BIP-85 Wallet #2
  
  BIP-85 Wallet #3
  
  Legacy Wallet
  
  Most users should use one of the three BIP-85 wallets. The legacy wallet should only be used for compatibility reasons.
  
  Say Wiped, Stop#
  
  The seed is wiped and the COLDCARD will display a message saying: Seed is wiped, Stop.
  
  Duress Wallet#
  
  Goes directly to a specific duress wallet. No side effects.
  
  The duress wallet is a personal safety feature. Create a duress wallet and add funds you are willing to lose. If you must reveal a PIN under duress, give the duress PIN instead of your Main PIN. To avoid alerting attackers, the COLDCARD will function as usual. Be aware that an attacker with enough technical expertise could detect the difference.
  
  These are the wallet options:
  
  BIP-85 Wallet #1
  
  BIP-85 Wallet #2
  
  BIP-85 Wallet #3
  
  Legacy Wallet
  
  Most users should use one of the three BIP-85 wallets. The legacy wallet should only be used for compatibility reasons.
  
  Video: Duress Wallet Setup
  
  Login Countdown#
  
  Pretends a login countdown timer (1 hour) is in effect. These are the choices:
  
  Wipe & Countdown#
  
  The seed is wiped before the countdown begins.
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Countdown & Brick#
  
  Video: Proper COLDCARD Disposal
  
  Does the countdown and then the system is bricked.
  
  Be careful with bricking the COLDCARD!
  
  The destruction process is quick and irreversible. You cannot reuse a bricked COLDCARD; discard it as e-waste.
  
  Just Countdown#
  
  Just shows the countdown timer. No effect on the seed.
  
  Look Blank#
  
  Look and act like a freshly wiped COLDCARD, but does not affect the actual seed.
  
  Just Reboot#
  
  Reboot when this PIN is entered. Doesn't do anything else.
  
  Delta Mode#
  
  ADVANCED!
  
  Logs into REAL seed and allows attacker to do most things, but will produce incorrect signatures when signing PSBT files. Wipes seed if they try to do certain actions that might reveal the seed phrase, but still a somewhat riskier mode.
  
  For this mode only, Trick PIN must be the same length as the true Main PIN and differ only in the final 4 positions (ignoring dash).
- Add If Wrong#
  
  After N incorrect PIN attempts, this feature will be triggered. It can wipe the seed phrase, and/or brick the COLDCARD.
  
  Regardless of this (or any other setting) the COLDCARD will always brick after 13 failed PIN attempts.
  
  Video: Add If Wrong Setup
  
  1. Select Add If Wrong from the Trick PINs Menu.
  
  2. Read the information, press OK/ENTER.
  
  3. Select the number of incorrect PIN attempts to activate this feature. If left blank, this will activate on any incorrect PINs.
  
  4. Choose what the COLDCARD will do on the selected number of incorrect PINs:
  Add If Wrong PIN Menu#
  
  Wipe, Stop#
  
  The seed is wiped and the COLDCARD will display a message saying: Seed is wiped, Stop.
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Wipe & Reboot#
  
  The seed is wiped and the COLDCARD reboots without notice.
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Silent Wipe#
  
  The seed is silently wiped and the COLDCARD acts as if the PIN code was just wrong.
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Brick Self#
  
  Video: Proper COLDCARD Disposal
  
  The COLDCARD becomes completely useless, and will only display the word Bricked forever.
  
  Be careful with bricking the COLDCARD!
  
  The destruction process is quick and irreversible. You cannot reuse a bricked COLDCARD; discard it as e-waste.
  
  Last Chance#
  
  Wipe the seed, then give one more try and then brick if one more wrong PIN is entered.
  
  Consequences of Wiping Seed Words
  
  Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
  
  Just Reboot#
  
  Reboot when this happens. Doesn't do anything else.
- Delete All#
  
  Remove all Trick PIN codes and special wrong-PIN handling.
- Edit Trick PINs or Wrong PIN Handling#
  
  Any existing Trick PINs, or a special wrong-PIN handling, will be at the top of the Trick PINs Menu.
  
  Select an existing Trick PIN, or WRONG PIN, from the Trick PINs Menu to begin editing it.
  - Edit Trick PINs or Wrong PIN Handling Menus#
    
    Edit Trick PIN Menu#
    
    Activate Wallet (Duress Wallet Only)#
    
    This option is only available if the Trick PIN is set to open a duress wallet.
    
    This will temporarily load the secrets associated with this trick wallet so you can perform transactions with it.
    
    To restore normal operation, reboot the COLDCARD, or select Restore Master from the Main Menu.
    
    Hide Trick#
    
    This will hide the Trick PIN from the menus, but it will still be in effect.
    
    You can restore it by trying to re-add the same PIN again.
    
    Delete Trick#
    
    Delete the Trick PIN.
    
    Change PIN#
    
    Change the PIN for this trick.
    
    Edit Wrong-PIN Handling Menu#
    
    Hide Trick#
    
    This will hide what happens with wrong PINs from the menus, but it will still be in effect.
    
    Delete Trick#
    
    Remove special handling of wrong PINs.
Set Nickname#

You can give your COLDCARD a personalized name. Once set, it will show this name immediately after turning on your COLDCARD. After viewing your nickname, press any key to proceed to the normal login process.

Video: Mk4: How to Set a Nickname

Video: Q: How to Set a Nickname
Scramble Keys#

Video: How to Use Scramble Keys

Enabling this feature randomizes the numbers associated with the buttons on the keypad. Cameras and shoulder-surfers watching won't figure out your PIN based on the keys you press.

The scrambled keypad changes for each part of your PIN on the MK4.

Q only: The lower row of numbers represent the keys on your COLDCARD, and the top row shows where those keys are now mapped. For instance, if the prefix of your PIN was 12, you would press 79 in this example. Scrambled Keys is ignored if Calculator Login is enabled.
Kill Key#

The Kill Key feature allows you to quickly wipe your seed during login by pressing a specific key. Each COLDCARD model handles the Kill Key slightly differently.

Mk4: If you press the Kill Key while viewing the anti-phishing words during login, your seed phrase will be immediately wiped. To avoid accidentally pressing your Kill Key, you must avoid making it the first number of the second half (suffix) of your PIN.

Q: If you press the Kill Key at any point during login, your seed phrase will be immediately wiped. The Kill Key is ignored if Calculator Login is enabled.

Consequences of Wiping Seed Words

Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.
Login Countdown#

Login Countdown lets you force a time delay when logging in to a COLDCARD. Once enabled, entering your PIN will bring up the Wait . . . screen before displaying Login countdown in effect. Must wait: with the selected delay period counting down.

Your delay choices are:
- Disabled
- 5, 15, or 30 minutes
- 1, 2, 4, 8, 12, 24, or 48 hours
- 3 days
- 1 week
- 28 days later
When the delay period has elapsed, enter your PIN to unlock your COLDCARD.

Plan ahead when selecting long delays. The COLDCARD requires continuous power for the entire delay period. Consider using an AC power source, charging a battery pack, or connecting to an uninterruptible power supply (UPS).

Countdown Limitations

Unlike most of our security features, the secure element does not impose the delay. Bypassing the delay by opening the plastic case and interacting directly with the hardware may be possible.

We still consider it a good defence against $5 wrench attacks, as physical attackers are not necessarily technical people.

Video: Setup COLDCARD Login Countdown
MicroSD 2FA#

This advanced security feature mandates the presence of a specially prepared MicroSD card during the login process. Upon entering your correct PIN, the device will verify the presence of the MicroSD card. If the card slot is either empty or contains an unrecognized card, the device will automatically wipe the seed.

Q Only: If multiple MicroSD cards are inserted during the login attempt, ensure that the authorized card is placed in the top slot (Slot A).

Consequences of Wiping Seed Words

Wiping your seed words will result in the loss of access to the Bitcoin, passwords, notes, and settings stored on your device. You can regain access to them by restoring your seed words from backup.

COLDCARD Guide: MicroSD 2FA
Steps to Setup MicroSD 2FA

1. Insert the MicroSD card into the COLDCARD. Be sure to use the top slot (Slot A) on the Q.

2. Select MicroSD 2FA from the Login Settings Menu.

3. Read the information, press OK/ENTER.

4. Make a selection from these choices (if you have never setup MicroSD 2FA, then Add Card will be your only option):
- Add Card#
  
  If no MicroSD 2FA is setup, then this options adds the inserted card as the 2FA device. Going forward this card must be present during login process or the seed will be wiped!
  
  If you already have a different MicroSD setup as a 2FA device, then this option allows you to add a new MicroSD card as an additional 2FA device. Going forward this card, or one of the others, must be present during login process or the seed will be wiped.
- Check Card#
  
  Validates the inserted card and indicates if it would be accepted or not.
- Remove Card #N#
  
  Remove card N from the approved list. When the last card is removed, the feature is disabled and no card will be required for login. Access to the card in question is not required to remove it.
Calculator Login (Q only)#

Video: How to Enable Calculator Mode

When enabled, the usual PIN entry screen is replaced with a functional calculator.

Enter your PIN as 12-12 or 12 12 to unlock the COLDCARD. To verify anti-phishing words, enter your PIN prefix and a dash: 12-.

Default Off#

Disable calculator login.

Calculator Login#

Enable calculator login.
Test Login Now#

Immediately reboots your COLDCARD and starts the normal login process.

Hardware On/Off#

Allows you to manage and control the various hardware interfaces of the COLDCARD, including USB connectivity, Virtual Disk functionality, and NFC communication.

Hardware On/Off Menu

Video: Tutorial: Disable NFC and USB

USB Port#

Disabling will block any data over the USB port. Useful when your plan is air-gap usage.

Default On#

Enable data over USB port.

Disable USB#

Disable data over USB port.
Virtual Disk#

The COLDCARD can emulate a 4MB virtual disk drive where new PSBT files can be saved. Signed PSBT files will also be saved here.

In Auto Mode, the COLDCARD will begin the signing process on PSBT files as soon as they are written to the Virtual Disk.

Video: COLDCARD Virtual Disk Mode

Default Off#

Disable Virtual Disk.

Enable#

Enable Virtual Disk.

Enable & Auto#

Enable Virtual Disk in Auto Mode.

PSBT files written to the Virtual Disk in Auto Mode will be automatically selected for signing by the COLDCARD.
NFC Sharing#

NFC (Near Field Communication) provides a seamless and convenient method for interacting with your COLDCARD device. This technology allows a phone or other NFC-enabled device to effortlessly "tap" the COLDCARD to send or receive data, all while preserving an air gap for enhanced security. The process is swift and user-friendly, making it an excellent choice for those who value efficiency and ease of use in managing their Bitcoin.

However, for users who prioritize the utmost level of security and prefer to eliminate any potential risk, even the minimal exposure associated with NFC, this feature can be disabled. While NFC offers a high degree of convenience, those with heightened security concerns may choose to turn it off to ensure an even stricter adherence to air-gapped security protocols.

Video: Mk4 Enable NFC

Video: Q Enable NFC

COLDCARD Guide: NFC Tools

Default Off#

Disable NFC hardware.

Enable NFC#

Enable NFC hardware.

Multisig Wallets#

The Multisig Wallets Menu is designed for importing, exporting, and managing multisig wallet configurations.

This includes creating Airgap Multisig wallets directly on the COLDCARD, and interacting with existing wallets through detailed management options.

Multisig Wallets Menu

COLDCARD Guide: Multisig

COLDCARD Guide: Airgap Multisig

Import from File#

The COLDCARD will check any SD card inserted for multisig wallet export files.

Accepted Formats

The multisig wallet to be imported from file must be one of the following formats:

COLDCARD Export

BIP-380 Descriptor

Video: Import Multisig From File

Steps to Import a Multisig Wallet From File

1. Export the multisig wallet file to a MicroSD card.

2. Insert the MicroSD card into the COLDCARD.

3. Select Import from File on the Multisig Wallets Menu.

4. Pick the file that was exported in step 1.

5. Review the details.

6. Press OK/ENTER to import.

7. Your multisig wallet has been imported, and can now be found at the top of the Multisig Wallets Menu.
Import from QR (Q only)#

The QR scanner is started. You can scan a QR code containing a multisig wallet in an accepted format.

Accepted Formats

The multisig wallet in the scanned QR code must be one of the following formats:

COLDCARD Export

BIP-380 Descriptor

Video: Import Multisig From QR Code

Steps to Import a Multisig Wallet From QR Code

1. Export the multisig wallet file as a QR code.

2. On the COLDCARD, select Import from QR on the Multisig Wallets Menu.

3. Scan the QR code of the exported multisig wallet.

4. Review the details.

5. Press OK/ENTER to import.

6. Your multisig wallet has been imported, and can now be found at the top of the Multisig Wallets Menu.
Import via NFC#

The NFC reader is started. You can tap an NFC enabled device to the COLDCARD to transfer a multisig wallet in an accepted format.

Accepted Formats

The multisig wallet to be imported via NFC must be one of the following formats:

COLDCARD Export

BIP-380 Descriptor

Steps to Import a Multisig Wallet via NFC

1. NFC Hardware must be enabled on the COLDCARD.

2. Export the multisig wallet via NFC on another device.

3. On the COLDCARD, select Import via NFC on the Multisig Wallets Menu.

4. Tap the exporting device to the COLDCARD.

5. Review the details.

6. Press OK/ENTER to import.

7. Your multisig wallet has been imported, and can now be found at the top of the Multisig Wallets Menu.
Export XPUB#

This creates a small file containing the extended public keys (XPUB) you would need to join a multisig wallet.

Public keys for BIP-48 conformant paths are used:
- P2SH-P2WSH: m/48h/0h/{acct}h/1h
- P2WSH: m/48h/0h/{acct}h/2h
Video: Mk4 Export XPUB

Video: Q Export XPUB

Steps to Export XPUB

1. Select Export XPUB from the Multisig Wallets Menu.

2. Read the information, press OK/ENTER.

3. Enter an account number, or leave blank for the default account. Press OK/ENTER.

4. Choose how to export:

    a. Press 1 to export to the MicroSD card (Slot A on the Q).

    b. On the Q only: press B to export to the MicroSD card in slot B.

    c. Press 2 to export to the Virtual Disk (if enabled).

    d. Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

    e. On the Q only: press the QR key to export via QR code.
Create Airgapped#

This feature allows the COLDCARD to be used as a multisig coordinator. This enables the creation of airgapped multisig wallets from XPUBS exported from other COLDCARDs.

The number of XPUBs found on the MicroSD card or Virtual Disk will determine the N value (total signers) for the multisig, and can be up to 15.

The user is free to choose any M value (signers needed to spend).

COLDCARD Guide: Airgap Multisig

Video: Create Airgap Multisig

Steps to Create an Airgapped Multisig Wallet

1. Export all the XPUBs you would like to include in the multisig wallet to the MicroSD card or Virtual Disk.

    a. If you are using a MicroSD card, insert it into the COLDCARD.

    b. If you intend to use the Virtual Disk, make sure there are no MicroSD cards in the COLDCARD.

2. Select Create Airgapped from the Multisig Wallets Menu.

    a. Q Only: Press the QR key to use QR codes (BBQr), or press Enter to use MicroSD card(s).

3. Press OK/ENTER to use the default P2WSH address type, or press 1 to use P2SH-P2WSH.

4. Use keys 7 or 9 to change the M value (signers needed to spend) of the multisig.

5. Press OK/ENTER when the details are correct.

6. Review the details of the multisig wallet.

    a. At this point you can press 1 to see the extended public keys of the wallet.

    b. If something is not correct with the multisig details you can press CANCEL at this time.

7. When the multisig details are correct, press OK/ENTER to create the wallet.

8. Next you will choose how to export the COLDCARD multisig setup file:

    a. Press 1 to export to the MicroSD card (Slot A on the Q).

    b. On the Q only: press B to export to the MicroSD card in slot B.

    c. Press 2 to export to the Virtual Disk (if enabled).

    d. Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

    e. On the Q only: press the QR key to export via QR code.

9. Finally, you need to select how to export the Electrum multisig wallet file:

    a. Press 1 to export to the MicroSD card (Slot A on the Q).

    b. On the Q only: press B to export to the MicroSD card in slot B.

    c. Press 2 to export to the Virtual Disk (if enabled).

    d. Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

    e. On the Q only: press the QR key to export via QR code.

10. Your multisig wallet has been created, and can now be found at the top of the Multisig Wallets Menu.
Trust PSBT?#

This setting controls what the COLDCARD does with the co-signer public keys (XPUB) that may be provided inside a PSBT file. There are three choices:

Verify Only#

Do not import the XPUBs found, but do verify the correct wallet already exists on the COLDCARD.

Offer Import#

If it's a new multisig wallet, offer to import the details and store them as a new wallet in the COLDCARD.

Trust PSBT#

Use the wallet data in the PSBT as a temporary multisig wallet, and do not import it. This permits some deniability and additional privacy.

Multisig PSBT Defaults

When the XPUB data is not provided in the PSBT, regardless of the above, we require the appropriate multisig wallet to already exist on the COLDCARD. The default is to Offer Import unless at least one multisig wallet already exists, in which case the default becomes Verify Only.
Skip Checks?#

You may disable some of the checks involved in multisig PSBT processing. This permits PSBTs to be signed that may be generated with less-than-perfect software, but which you know are not security hazards.

After reading the warning, press 4 to access the Skip Checks Menu. These are your choices:

Normal#

All the normal verification checks are done on multisig PSBTs.

Skip Checks?#

Some of the verification checks the COLDCARD typically does on multisig PSBTs are disabled. This can help you to sign PSBTs created by other wallets.

Use at Your Own Risk

These checks exist for good reason! The signed transaction may not be accepted by the network.

This setting only will last until you power down the COLDCARD.

Skip Checks? Information

This setting is not preserved, and will be reset to Normal after each shutdown.
Unsorted Multisig#

This setting will allow you to import and operate "multi(...)" unsorted multisig wallets that do not follow BIP-67.

Press 4 to access the Unsorted Multisig Menu. These are your options:

Do Not Allow#

Do not allow "multi(...)" unsorted multisig. This is the default setting.

Allow#

Allow "multi(...)" unsorted multisig wallets that do not follow BIP-67.

Use at Your Own Risk

Disabling BIP-67 is discouraged!

It is of CRUCIAL importance for unsorted wallets to backup multisig descriptors, and preserve order of the keys in it.
Existing Multisig Wallets#

If the COLDCARD knows about any multisig wallets, they will be listed at the top of the Multisig Wallets Menu in place of (none setup yet).

Selecting one of the existing wallets will open a menu for interacting with it.

Existing Multisig Wallet Menu#

On the Multisig Wallets Menu, select the multisig wallet you would like to interact with.

These are the available options:

View Details#

View detailed information about the multisig wallet.

Delete#

Completely remove the multisig wallet from the COLDCARD.

Make Sure You Have Backups

There is no way to reverse the deletion process. Before you delete a multisig wallet, be sure to have backups.

Coldcard Export#

Export the multisig wallet in the COLDCARD export format.

Choose how to export:

Press 1 to export to the MicroSD card (Slot A on the Q).

On the Q only: press B to export to the MicroSD card in slot B.

Press 2 to export to the Virtual Disk (if enabled).

Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

On the Q only: press the QR key to export via QR code.

Descriptors#

This will open a menu that allows you to view or export the multisig wallet descriptors.

COLDCARD Guide: Export Multisig Descriptors

COLDCARD Guide: Descriptors & Multisig

View Descriptor#

View the BIP-380 descriptor of the multisig wallet. Press 1 to export a human readable version.

Choose how to export:

Press 1 to export to the MicroSD card (Slot A on the Q).

On the Q only: press B to export to the MicroSD card in slot B.

Press 2 to export to the Virtual Disk (if enabled).

Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

On the Q only: press the QR key to export via QR code.

Export#

Export the multisig wallets BIP-380 descriptor.

Choose how to export:

Press 1 to export to the MicroSD card (Slot A on the Q).

On the Q only: press B to export to the MicroSD card in slot B.

Press 2 to export to the Virtual Disk (if enabled).

Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

On the Q only: press the QR key to export via QR code.

Bitcoin Core#

Export the multisig wallets descriptor in Bitcoin Core format.

Choose how to export:

Press 1 to export to the MicroSD card (Slot A on the Q).

On the Q only: press B to export to the MicroSD card in slot B.

Press 2 to export to the Virtual Disk (if enabled).

Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

On the Q only: press the QR key to export via QR code.

Electrum Wallet#

Exports a skeleton Electrum wallet file. You can open that file with an Electrum wallet to have a watch-only copy of the multisig wallet.

Choose how to export:

Press 1 to export to the MicroSD card (Slot A on the Q).

On the Q only: press B to export to the MicroSD card in slot B.

Press 2 to export to the Virtual Disk (if enabled).

Press 3 on the Mk4, or the NFC key on the Q, to export via NFC.

On the Q only: press the QR key to export via QR code.

Privacy Sensitive File

The file created is privacy sensitive since it includes the XPUBs of all the wallets involved in the multisig.

NFC Push TX#

When NFC Push TX is enabled, immediately after transaction signing, you can tap any NFC-enabled phone on the COLDCARD and your newly-signed transaction will be immediately broadcasted on the public network. This provides users with a simple and convenient way to finish sending a transaction while maintaining an airgap.

You must choose from the default providers, or give your own URL.

NFC Push TX Menu

Video: NFC Push TX

coldcard.com#

This will use the Push TX service hosted by Coldcard.com. The source code for the service can be found here.
mempool.space#

Use the Push TX service hosted by Mempool.space. The source code can be found here.
Custom URL...#

This option will let you enter your own URL that is setup to push transactions.

How To: Host a Push TX Service
Disable#

Disable NFC Push TX.

Display Units#

View your funds as BTC (default), mBTC, bits, or sats.

Display Units Menu

Max Network Fee#

Transactions signed by a COLDCARD usually include a small network fee. The network fee goes to the miner validating your transaction. Your COLDCARD will refuse to sign transactions with a fee higher than the percentage you set.

Typically, network fees are minimal compared to the transaction values. Your COLDCARD will always warn you if the transaction fee exceeds 1% of the output value.

The default hard limit is 10%. You also have the options of 25%, 50%, or no limit. Changing or removing network fee limits does not remove the 1% warning. If the warning appears, you can approve the transaction as usual.

Max Network Fee Menu

Idle Timeout#

Most people use their COLDCARD to authorize a transaction and then put it away. Typical usage times are brief. Setting the Idle Timeout to match your expected usage time helps prevent "evil maid attacks" where a device left unattended can be compromised.

The default setting for Idle Timeout is four hours. There are preset time limits to select from. You can turn off Idle Timeout by selecting Never.

When the chosen time limit has passed, the screen will display Cleanup . . . as it logs out.

Idle Timeout Menu

Idle Timeout (on battery)#

Q Only: Same as Idle Timeout, but only when using the Q with battery power. The default setting is 10 minutes.

Idle Timeout (on battery) Menu

LCD Brightness (on battery)#

Q Only: This controls the brightness of the LCD display while using the batteries. Choose from preset percentages. The default is 80%.

LCD Brightness (on battery) Menu

Delete PSBTs#

PSBT files (on MicroSD card or Virtual Disk) will be blanked and deleted after they are used. The signed transaction will be named <TXID>.txn, so the file name does not leak information.

MS-DOS tools should not be able to find the PSBT data (ie. undelete), but forensic tools which take apart the flash chips of the MicroSD card may still be able to find the data or filename.

Delete PSBTs Menu

Default Keep#

Keep PSBTs after they are signed.
Delete PSBTs#

Delete PSBTs after signing, and change the signed transaction file name to: <TXID>.txn.

When enabled, allows scrolling past the top or bottom of a menu. By default this only happens in very large menus.

Menu Wrapping Menu

Default Off#

The default setting, Menu Wrapping is not enabled.
Enable#

Enable Menu Wrapping. You will be able to scroll past the top or bottom of any menu.

Forces display of XFP (seed fingerprint) at the top of the Main Menu. Normally, XFP is shown only when a Temporary Seed is active.

Master Seed is displayed as <XFP>, Temporary Seeds as [XFP].

Home Menu XFP Menu

Only Tmp#

Only show the XFP on the Main Menu if a Temporary Seed is active. This is the default setting.
Always Show#

Always show the XFP of the current wallet on the Main Menu.

Keyboard EMU#

Adds the Type Passwords option to the Main Menu. When selected, the COLDCARD allows you to type deterministically-generated passwords directly to a computer connected via USB by emulating a keyboard.

The passwords are generated using BIP-85, so the user only needs to enter an account number to get the desired password.

Keyboard EMU Menu

COLDCARD Guide: BIP-85 Passwords

Default Off#

The Type Passwords option is not available on the Main Menu. This is the default setting.
Enable#

Type Passwords is an option on the Main Menu. Select it to begin keyboard emulation and type passwords over USB.

Steps to Type Passwords

1. Enable Keyboard EMU.

2. Connect the COLDCARD via USB to the computer you would like to type the password on.

3. Select Type Passwords from the Main Menu.

4. Enter the account number for the correct passphrase.

5. Review the details.

6. On the computer, use the mouse to select the prompt where the password should be typed.

7. On the COLDCARD, press OK/ENTER to type the password.

Obsolete Settings#

Touch Settings (Mk1 only)#

The number pad uses capacitive touch technology. Adjust the touch sensitivity with this menu. In warm or humid environments, or in cases where you see phantom keypresses, choose -2 Sensitive (least sensitive). There is +2 Sensitive for the impatient, which feels quicker and more responsive.

pin-menu

The latest version of the firmware includes five different levels of sensitivity. Please note that less-sensitive modes are a little slower to respond to your touch.

(Removed on Mk2 hardware)

Secondary Wallets (Mk1, Mk2 only)#

In earlier makes of the COLDCARD, there was a concept of a secondary wallet that had most of the features of the main wallet but a separate PIN code and seed words. Due to hardware limitations and security-related changes, we removed this from the Mk3 COLDCARD.

(Removed after Mk2)

Settings Menu

Login Settings#

Change Main PIN#

Trick PINs#

Add New Trick#

New Trick PIN Menu#

Brick Self#

Wipe Seed#

Wipe & Reboot#

Silent Wipe#

Wipe -> Wallet#

Say Wiped, Stop#

Duress Wallet#

Login Countdown#

Wipe & Countdown#

Countdown & Brick#

Just Countdown#

Look Blank#

Just Reboot#

Delta Mode#

Add If Wrong#

Add If Wrong PIN Menu#

Wipe, Stop#

Wipe & Reboot#

Silent Wipe#

Brick Self#

Last Chance#

Just Reboot#

Delete All#

Edit Trick PINs or Wrong PIN Handling#

Edit Trick PINs or Wrong PIN Handling Menus#

Edit Trick PIN Menu#

Activate Wallet (Duress Wallet Only)#

Hide Trick#

Delete Trick#

Change PIN#

Edit Wrong-PIN Handling Menu#

Hide Trick#

Delete Trick#

Set Nickname#

Scramble Keys#

Kill Key#

Login Countdown#

MicroSD 2FA#

Add Card#

Check Card#

Remove Card #N#

Calculator Login (Q only)#

Default Off#

Calculator Login#

Test Login Now#

Hardware On/Off#

USB Port#

Default On#

Disable USB#

Virtual Disk#

Default Off#

Enable#

Enable & Auto#

NFC Sharing#

Default Off#

Enable NFC#

Multisig Wallets#

Import from File#

Import from QR (Q only)#

Import via NFC#

Export XPUB#

Create Airgapped#

Trust PSBT?#

Verify Only#

Offer Import#

Trust PSBT#

Skip Checks?#

Normal#

Skip Checks?#

Unsorted Multisig#

Do Not Allow#

Allow#

Existing Multisig Wallets#

Existing Multisig Wallet Menu#