COLDCARD Mk4 with upgraded secure elements, USB-C connector, new plastic, optional NFC, massive RAM for multisig, and much-much more.

Learn more here.

USB cable not included

For one special bundle price, you get:

1 x COLDCARD™ Mk4
2 x Industrial MicroSD

For one special bundle price, you get:

2 x COLDCARD™ Mk4
2 x Industrial MicroSD
1 x Power-Only USB-C Cable
1 x SEEDPLATE™ Backup
1 x Center Punch
1 x COLDPOWER Adapter
1 x Security Bag Kit

For one special bundle price, you get:

1 x COLDCARD™ Mk4
1 x Industrial MicroSD
3 x SEEDPLATE™ Backup
1 x Security Bag Kit

For one special bundle price, you get:

1 x COLDCARD™ Mk4
2 x TAPSIGNER™

For one special bundle price, you get:

3 x COLDCARD™ Mk4
6 x Industrial MicroSD
1 x Sticker Collection
2 x Security Bag Kit

Our second Bitcoin art piece with 7 EInk digits. Track prices from exchanges, see blocks as they are published by miners and connect Opendime to display balance, fiat value, and deposit QR codes. Size 30×10 cm.

Requires WiFi & Internet connection.

The cute little sibling to our MINI Blockclock: the new MICRO!

Same huge selection of data values from exchanges and the blockchain, but about a third the size on your desk, with a single e-ink display. Size 11×7 cm.

Requires WiFi, Internet connection, and USB power source. Cable included.

Special ORANGE edition of our standard V4 OPENDIME™. No software differences, just the unique and Bitcoin-appropriate color!

Finally a stealth-looking edition of our standard V4 OPENDIME™. Plain Green PCB. All outside references to Bitcoin have been removed and comes in a new shape, but no software differences. Obverse side reads "Flash Drive / 32 bytes".

NEW v4! Fourth generation of the OPENDIME™: a small USB stick that allows you to spend Bitcoin like a dollar bill. Pass it along multiple times. Connect to any USB to check balance. Unseal anytime. Trust no one.

Magnetic Power-Only Cable with 3x USB-C Adapters.
Power your COLDCARD Mk4, with confidence that the data lines are not connected! Leave the USB-C adapter (3 included) attached, and then easily magnetically snap it into place as needed (a "port saver").

Only for Mk4 (not Mk3 or earlier).

Industrial Grade MicroSD for secure Coldcard backups.
True SLC design w/ wear-leveling & block mgmt. Environmental tested (bend / torque / salt spray / solar radiation) and harsh temperatures: -40°C to +85°C.

Picture for illustration only.

Power your Coldcard and other low power USB devices from a standard 9-volt battery without any USB data concerns. Makes a great gift for the cypherpunk in your life. Learn more here.

Adaptor only. Cable and battery not included. 5volts at 500mA max current.

Single 24 word plate, 12 words per side! Quality, thick steel, cut and etched in Canada. Etched text marks chemically colored in black for better legibility. This design was kept small in size, for better storage and concealment. Learn more.

Center Punch sold separately. Design may vary depending on batch.

We recommend using this Automatic Center Punch for marking the SEEDPLATE. Just press and it will automatically snap to mark. Made out of High Speed Steel.

Water resistant metal capsule to hold your Opendimes! Big enough for a bunch of Opendimes (any generation) or a single 2.75" 12-gauge round. Colour: space grey.

OPENDIME™ sold separately.

Save time rolling dice with a bag of 100 cute and tiny little dice. Generates 256 bits of entropy in a single shake! Watch the video here. 100 quantity, 5mm, black/white D6 dice.

COLDCARD and SEEDPLATE sold separately.

3 x Opaque, Tamper-Evident bags
4 x Recovery Cards
2 x ESD bags

Bag internal size is 10.5x6in

Water-resistant, black, hard-case with custom protective foam for the COLDCARD Mk4. Un-branded and low profile. see more pictures here

COLDCARD Mk4 not included.

White, 3 meter (9 ft), USB-C to USB-C cable. Intended to power the BLOCKCLOCK™ micro, but works with any USB-C device.

Does not include AC/DC adapter. Also works with Mk4.

Power your BLOCKCLOCK™ micro with this AC adapter (2A at 5v). Accepts 100-240 volts AC and makes exactly the power the MICRO craves.

Does not include cable. Also works with Mk4.

For one special bundle price, you get:

1 x COLDCARD™ Mk4
2 x Industrial MicroSD
1 x Power-Only USB-C Cable
1 x SEEDPLATE™ Backup
1 x Center Punch
1 x COLDPOWER Adapter
1 x Security Bag Kit

For one special bundle price, you get:

1 x COLDCARD™ Mk4
1 x Pink Mk4
1 x Blue Mk4
1 x Green Mk4
1 x Orange Mk4
1 x Purple Mk4

For one special bundle price, you get:

1 x COLDCARD™ Mk4
1 x Gold Mk4
1 x Glow-In-The-Dark Mk4
1 x Black Mk4

New COLDCARD Q1 with QR scanner, 3xAAA battery support, dual SD cards, qwerty keyboard and huge new screen. Includes all Mk4 features.

Learn more here.

Lock your place in line with this reservation. Batteries & USB cable not included.