Coldcard Mk4
Key features
Supported coins
Supports only Bitcoin
Open source
- Firmware
- Companion software
Seedphrase support
- BIP-39 (Mnemonic phrase)
- Passphrase
Security protections
- Secure element
- On device PIN entry
- Factory reset with wrong PIN
- Factory reset with decoy PIN
- Fake wallet with duress PIN
- On device passphrase entry
- On device recovery
Dual Secure Element
Multiple Trick PIN features
– Duress PIN
– Countdown to Brick (or Reset) PIN
– Brick Me PIN
– Login Countdown
On device recovery requires a previous SD Card backup or XPRV private key file on SD Card
Platform support
- Windows
- macOS
- Linux
Technical specification
Release year
Coldcard Mk4 was released in 2022
Dimensions
88 mm x 52 mm x 10 mm
3.46 in x 2.05 in x 0.39 in
Weight
30 g
1.06 oz
Display
- Monochrome
- OLED
128 x 64 pixels
Connectivity
- USB-C
- NFC
Storage
- microSD card
Battery
USB Cable Required for Power
Processor
120 MHz CPU
Housing
Plastics
Manufacturer information
Brand deep-dive
- Can generate BIP-85 passwords. This feature derives a deterministic password from your seed, according to BIP-85 PWD BASE64. Generated passwords can be sent as keystrokes via USB to the host computer
- can act both as signer and coordinator in Bitcoin Secure Multisig Setup (BSMS, BIP-129)