A smart door lock is a modern solution for controlling home access through multiple convenient methods. It can be unlocked using a traditional key, fingerprint, Face ID, smart card, password, or mobile phone via Bluetooth or internet connection. Smart door locks come in different types: some include a built‑in camera for monitoring, while others come without a camera. There are models that support all access methods, and others that offer limited options such as fingerprint and password only, providing flexibility to match different security needs and user preferences