New Coldcard Mk3 with upgraded secure element, 2.5x more RAM for more complex transactions, additional side-channel defenses, and much more! Learn more here.

For one special bundle price, you get:

1 x COLDCARD® Mk3
2 x Industrial MicroSD

For one special bundle price, you get:

2 x COLDCARD® Mk3
2 x Industrial MicroSD
1 x Power-Only USB 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® Mk3
1 x Industrial MicroSD
3 x SEEDPLATE™ Backup
1 x Security Bag Kit

For one special bundle price, you get:

1 x COLDCARD® Mk3
1 x Industrial MicroSD
1 x 3-Pack (v4)

For one special bundle price, you get:

3 x COLDCARD® Mk3
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.

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 MicroUSB Adapters.
Power your Coldcard, with confidence that the data lines are not connected! Leave the MicroUSB adapter (3 included) attached, and then easily magnetically snap it into place as needed (a "port saver").

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, 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—only 5x3"—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.
Opendimes 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)

All the stickers!

Don't Trust - Verify

Black, Twill Unstructured Cap.

COLDCARD and SEEDPLATE not included.

Honey Badger

Grey, Twill Unstructured Cap.

COLDCARD and SEEDPLATE not included.

Velcro Vinyl Patch: Coinkite Honey Badger (2 x 3 inches)
Hat not included

For one special bundle price, you get:

1 x COLDCARD® Mk3
2 x Industrial MicroSD
1 x Power-Only USB Cable
1 x SEEDPLATE™ Backup
1 x Center Punch
1 x COLDPOWER Adapter
1 x Security Bag Kit