Keystone 3 Pro

A hardware wallet is a small device that keeps your private keys offline and signs transactions inside itself. Even if your computer is infected, the keys never leave the device.

A seed phrase is a list of 12 or 24 ordinary words that can recreate all the keys of a wallet. Whoever has the words has the bitcoin, so write them on paper or metal and never type them into a website.

Multisig means a payment needs several keys out of a set, for example any 2 of 3. Losing one key, or having one stolen, does not lose the coins.

A device that never connects to a computer by cable or network; data moves by QR code or SD card.