4K Ultra HD - Reolink 4K Ultra HD (8MP) PoE camera delivers almost 4 times the clarity of 1080p. Our complete camera system provides users vivid resolution, even when you digitally zoom in. Any flaw or distortion you’ve encountered before has been eliminated, ensuring you the highest quality view of your surroundings. | Person/Vehicle Detection - Smart PoE IP cameras can identify people and vehicles in terms of their shapes, minimizing unwanted alerts such as animals or shadows. Cameras can also be configured to specify the type of detection when sending alerts to you. Know what happened simply by glancing at the lock screen. | Plug and Play PoE System - A simple PoE connection makes it easier to set-up and install your home security camera system. With a single network cable, stretching up to 330ft, users can enjoy smooth security coverage of their entire house. This is perfect for both beginners and DIY camera enthusiasts. | Continuous 24/7 Recording - With a pre-installed 2TB HDD, users are provided reliable 24/7 recording. You can also install an external hard drive (up to 6TB) for backup storage. | Compatible with All Reolink PoE IP Cameras: The 4K CCTV security camera system can be expanded up to an 8-camera kit with any Reolink PoE IP cameras o WiFi Camera without any compatibility issue. Supported Reolink 8MP/5MP/4MP IP cameras include: RLC-520A, 510A, 810A, 820A, 811A, TrackMix PoE, Duo 2 PoE, 510WA, etc.