Core Functions

1. Real-Time Video Monitoring
   Equipped with a high-definition camera (often 1080P or higher), the video doorbell captures clear images of the door area in real time. Many models feature wide-angle lenses (160° or more) to cover a broader range, reducing blind spots. Some also support night vision (via infrared or full-color night vision technology), ensuring clear visibility even in low-light or dark environments.

2. Two-Way Audio Communication
   Built-in microphones and speakers enable seamless voice interaction between users and visitors. For example, when a delivery person arrives, the user can remotely inform them where to place the package, or ask strangers about their purpose without opening the door.

3. Motion Detection & Alerts
   Using PIR (Passive Infrared) sensors or AI algorithms, the device detects movement near the door. When triggered, it automatically sends instant alerts (via app notifications) to the user’s smartphone, allowing timely awareness of any activity at the entrance—whether it’s a visitor, a potential intruder, or even a package delivery.

4. Remote Access & Control
   Through a dedicated mobile app, users can check live video, review recorded footage, and communicate with visitors from anywhere with an internet connection. This is especially useful for frequent travelers or those working outside, as it keeps them connected to their home’s entrance.

5. Video Recording & Cloud Storage
   Most video doorbells support local storage (via SD cards) or cloud storage, automatically recording video clips when motion is detected or the doorbell is pressed. Cloud storage (often subscription-based) allows users to access historical footage anytime, serving as evidence in case of security incidents.