What it is ?
Biometric door locks use personally identifiable information in lieu of a traditional key. They use a thermal or optical scanner to store the fingerprints of anyone authorized to unlock your door. Once the scanner determines that you are an authorized user, it prompts you to input a PIN to unlock the door. These locks are meant to provide convenience, since you don't have to keep track of a key, more than additional security. However, smart locks do come with a fail-safe key, in case the batteries or electricity powering the lock fails.