Biometric door locks utilize unique biological data, such as fingerprints, facial recognition, or iris scans, to grant secure entry to a property. By replacing traditional keys with encrypted digital templates, these systems significantly reduce the risk of unauthorized access through lost or duplicated physical keys. Many modern units feature integrated Wi-Fi or Bluetooth connectivity, allowing users to manage access permissions and monitor entry logs directly from a smartphone. Additionally, these locks often include secondary entry methods like PIN codes or mechanical keys to ensure reliability during power outages or technical glitches.