Four-megapixel PoE cameras connect to compatible network video recorders or PoE switches through a single Ethernet cable that carries both video data and power. The NVR or switch then passes the camera stream to a video management platform, with many models supporting ONVIF for integration with compatible surveillance systems.

Fixed-lens 4MP PoE cameras use a set focal length, so their viewing angle and image framing are established during installation. Varifocal 4MP PoE cameras use an adjustable lens, often with motorized zoom and autofocus, which helps installers fine-tune the scene for different distances or coverage needs.

Four-megapixel Power over Ethernet (PoE) cameras suit indoor and outdoor surveillance when you select a form factor and enclosure rated for the installation environment, such as a low-profile dome for interior spaces or a weather-resistant bullet or turret camera for covered or exposed locations. Many models include infrared night vision, wide dynamic range, or color-at-night technology to support clearer monitoring in low-light conditions.

When evaluating four-megapixel PoE cameras, compare the night-vision method, stated coverage distance, and low-light performance, along with whether wide dynamic range helps balance bright and shadowed areas. For storage and analytics, review local microSD capacity, NVR support, and available features such as motion detection, human detection, line crossing, intrusion, loitering, group detection, or AI event detection.