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Product description
COLDCARD is the most trusted and secure Bitcoin Hardware Wallet.
Introducing
The Coldcard (MK3)
Numeric Keypad
Full-sized numeric keypad makes entering PIN easy and quick.
Bright Screen
Bright, 128x64 pixel OLED screen. Shows all the critical details of your transactions.
Made in Canada
Lovingly soldered in Toronto, Canada. Secure supply chain verified with: tamper-evident numbered bag, with bag number recorded into device.
It's Ultrasecure
Real crypto security chip. Your private key is stored in a dedicated security chip, not the main micro's flash.
Easy Back-up
MicroSD card slot for backup and data storage. This allows truly offline signing, by transferring the unsigned/signed transactions on sneakernet.
Pin Games
Duress wallet features
Duress PIN
Coldcard provides an optional "duress PIN code". If you enter that PIN code, instead of the "real" PIN code, nothing special is shown on the screen and everything operates as normal... However, the bitcoin key generated is not the main key. It is effectively a completely separate wallet!
Countdown to Brick PIN
This is a covert variation of the BRICK ME PIN mode. It forces a time delay (of minutes/hours/days) when logging into the Coldcard.
BIP39 Passphrases (25th word)
Coldcard now supports BIP39 passphrases so you can also create an unlimited supply of distraction wallets. This feature is also useful for your own organization of funds or accounts. Unlike the single duress PIN, an unlimited number of related wallets can be created using BIP39.
Built-in Security
Most trusted and secured hardware wallet
Secure element for key storage
The Coldcard (MK3) uses Microchip's ATECC608A to store the critical master secret: the 24-word seed phrase for your BIP32/BIP39 wallet.
Genuine vs. Caution Lights
To resist Evil Maids, and other sneaky people with physical access to your Coldcard, we sign our firmware with a factory key. During boot-up, the firmware's signature, and every byte of flash memory, will be verified and the appropriate Green/Red light set.
Anti-phishing words
The PIN code on Coldcard is divided into two parts, such as 1234-5678. You first enter 1234 and then you will be shown two words on-screen. Those words are unique for all PIN prefixes, and for each Coldcard ever made.
Physical Security
The secure element and critical parts of the main micro are covered by epoxy at the factory. Our clear case is part of our security model too, so you can look and see if a "hardware implant" has been inserted inside your device.
HODL & Stack
Hardware wallets
Secure your crypto with a hardware wallet and take full control of your assets.
Common questions about Coldcard (MK3)
Why should I buy Coldcard (MK3) from Etherbit?
Etherbit is operating in India since 2017 and is trusted by your favourites: Polygon, Zebpay, WazirX, CoinSwitch Kuber, and more!
Should you have any queries, you can reach out to Coinkite via;
- Twitter: @Coinkite
- Support: support@coinkite.com
What is the price of Coldcard (MK3) in India?
Price of Coldcard (MK3) is ₹12,999 including all taxes & free shipping.
Where & how to buy Coldcard (MK3) in India?
Buy Coldcard (MK3) from Etherbit with free express shipping. Etherbit.in accepts payment via UPI, Google Pay, Amazon Pay, PhonePe, Credit Card, Debit Card, Net Banking, Paytm, MobiKwik, Freecharge, and Buy Now Pay Later.
Legal Metrology Product Declaration
| Manufacturer | Manufacturer Coinkite Inc Unit 376, 3219 Yonge Street, Toronto, Ontario, M4N 3S1, Canada |
| Country of Origin | Country of Origin Canada |
| Generic name of the Product | Generic name of the Product Bitcoin crypto wallet |
| Importer | Importer Etherbit Private Limited A1-1205 Rudra Enclave, Althan-Bhimrad Canal Road, Bhimrad, Surat, Gujarat 395007, India |
| Customer Support | Customer Support |