Coldcard mk4

Contact sales for bulk, enterprise, and rate contract purchases. Bright, x64 pixel OLED screen.

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Coldcard mk4

We use cookies to improve your browsing experience, analyse site traffic and increase the performance of our site. You can change the cookie settings below. For more information, see our privacy policy. The Coldcard is highly sought after amongst hardcore Bitcoin enthusiasts, with it's simplistic design and vast array of security features on top of what you'd expect from a market-leading hardware wallet. The Coldcard MK4 uses fully open source technology. Anyone is able to view, edit and verify the code. The verifiability of the device allows the brightest minds in the Crypto space to evaluate and test the workings of the device, making for exceptionally high security standards. Creating a backup of your seed phrase is quick an easy using a Micro SD card. You can also display your seed words if you wish to create a more durable, long-term backup. There are numerous ways to connect using the Coldcard MK4, all allow for a secure connection to be made without exposing your private keys. Where the Coldcard MK4 differs from other hardware wallets on the market, is with it's range of optional features which can be used to enhance the security of your device, including:.

Contact sales for bulk, enterprise, and rate contract purchases. Lightweight Construction: Weighing in at approximately 30 grams, it is exceptionally lightweight.

The Coldcard Mk4 is the on cutting edge of Bitcoin security, featuring:. It provides the best Physical Security. Your seed words are stored in specialized chips, designed solely to securely store secrets. Now dual-vendor! All of the Coldcard code is viewable, editable, and verifiable. You can compile it yourself.

This means the flash memory has the correct contents. There is no way for trojan software to change this light to green without your PIN. Obviously, the COLDCARD from the factory will have a green light, and after each firmware upgrade, we update the checksum that is performed so the light will be green again. The only time you should see a red light is during a firmware upgrade process the first time you enter the PIN after the upgrade , and briefly during power-up sequence when the verification is on-going. You should assume someone has tampered with its firmware, and it might operate normally, but in fact be trying to steal your money. For more technical background on this security feature please have a look at this whitepaper. Skip to content.

Coldcard mk4

It can also import 12, 18, and word, BIP seeds that other wallets may have created. There is a single "wallet", derived from the BIP seed words. In addition, we have an optional "duress" wallet, which is derived from the wallet's seed words and is not independent. This means it gets backed-up automatically, and the original seed words also backup the duress wallet. By adding a BIP passphrase you can unlock nearly unlimited additional wallets which derive from the original 24 seed words. The passphrase you use defines the wallet and cannot be changed.

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Warranty -. Timelock Feature: The timelock feature is a valuable tool for adding an extra layer of control to your transactions. Track prices from exchanges, see blocks as they are published by miners and connect Opendime to display balance, fiat value, and deposit QR codes. Micro SD Card Slot: Used for backup and recovery, this makes it easy to back up your wallet and store it in a secure location. Real crypto security chips. You can compile it yourself. We offer a full 30 day returns policy. Trezor's response to this is the ability to set decoy passphrases. Sold out. This special item requires unique handling and cannot be combined with multiples of the same item. Pass it along multiple times. Saves your screen from damage! Works with.

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Long-Term Storage: If you're in it for the long haul, a hardware wallet is your best friend. Furthermore, the Coldcard Mk4's viewable electronics and epoxy-protected components make it more resistant to physical tampering compared to the Trezor Model T. It's best to do only reservations and giftcards in one invoice. What is Blockchain in Simple Terms? Verifiable Source Code. Product Category. Let us keep you up to date with our detailed crypto news coverage. According to their website: "Bitcoin and Bitcoin Testnet are supported. Review Inquiry. AI Generated Summary. MicroSD card slot for backup and data storage. Open Source: One of the most significant strengths is its open-source nature. Cable and battery not included. What are my delivery options? Add to Cart Buy Now.