Coldcard Hardware Wallet
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Power & Login

Scramble Keypad (optional)

This feature helps protect from cameras and other observers by randomizing the numbers for entering the PIN on the display.
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Steps:
  1. 1.
    Go to Settings
  2. 2.
    Select Scramble Keypad
  3. 3.
    Press OK
Your keypad will now be scrambled!

Disable USB (optional)

This is to operate your device in a complete airgapped manner in case you do not have a power-only USB cable, since the data communication from the Coldcard will be deactivated as soon as this function is enabled.
Steps:
  1. 1.
    Go to Settings
  2. 2.
    Select Disable USB

Idle Timeout (optional)

Once activated, this feature will turn off the Coldcard after a predefined amount of time has elapsed.
You can set it to different values between two minutes and eight hours, or disable the idle auto-logout function completely.
Steps:
  1. 1.
    Go to Settings
  2. 2.
    Select Idle Timeout
  3. 3.
    Select time
    • Default timeout period is 4 hours