Coldcard is an easy to use, ultra-secure, open-source and affordable hardware wallet that is easy to back up via an encrypted microSD card. Your private key is stored in a dedicated security chip. MicroPython software design allows you to make changes.
Control over your money
This wallet gives you full control over your bitcoins. This means no third party can freeze or lose your funds. You are however still responsible for securing and backing up your wallet.
Payment validation features are provided by the software wallet you use with this device.
This wallet is open-source and built deterministically. This means any developer in the world can audit the code and make sure the final software isn't hiding any secrets.
Very secure environment
This wallet is loaded from a secure specialized environment provided by the device. This provides very strong protection against computer vulnerabilities and malware since no software can be installed on this environment.
Privacy features are provided by the software wallet you use with this device.
Variable fee control
Fee control features are provided by the software wallet you use with this device.