Motion detection plug-in cameras connect to the network through a dedicated Ethernet cable that carries video and event data to a compatible PoE switch or network video recorder. The same cable supplies power through Power over Ethernet, which can simplify installation by reducing the need for a separate power connection at the camera.

When comparing motion detection plug-in cameras, look for basic motion sensing, human detection, line crossing, intrusion detection, loitering detection, and people-gathering detection. Basic sensing can trigger on movement, while human detection and rule-based features such as line crossing or intrusion detection can help reduce irrelevant alerts and focus monitoring on defined areas or events.

Many motion detection plug-in cameras can record locally to a microSD card, allowing standalone operation without an NVR. An NVR remains an option when you need centralized recording, expanded storage, or management for multiple cameras.

When installing motion detection plug-in cameras, look for adjustable motion zones and sensitivity, human detection, line-crossing or intrusion alerts, and local storage or network recording options. For outdoor placement, select a weather-resistant camera with suitable low-light performance, a field of view that covers the activity area, and a power and data connection that fits the installation.