Get the extension What is a hardware wallet?
A hardware wallet is a small dedicated device that generates and stores a private key and signs transactions inside itself. Ledger, Trezor and Keystone are well-known brands. The computer prepares the transaction; the device signs it.
Why it matters
Keeping the key on separate hardware means a compromised computer cannot read it. The limits are practical: the device costs money, most models connect by USB or Bluetooth, the screen is small, and some cannot fully decode what a dApp asks you to sign, which leads to blind signing.
How Locker Protocol Wallet handles it
Locker Protocol Wallet does not work with Ledger or Trezor. It reaches the same goal another way: the key lives on Locker Vault, a free app on a phone that stays offline, with a full-size screen to read the transaction and no cable or Bluetooth link, only QR codes.
Questions
Is a phone as safe as a hardware wallet?
A phone that is online is not. A phone that is reset, set up as a signer and never reconnected removes the network path that remote attacks need. Against someone who physically takes the device, a hardware wallet's secure chip does more; on the Vault, the keys are encrypted with your master password.
Do I need a hardware wallet to use Locker Protocol Wallet?
No. The Vault app takes its place. You need the browser extension and a spare phone or tablet to keep offline.