. About this item 5 Megapixels, 30m night vision: 2560x1920 super HD detail image and up to 30m night vision video surveillance, almost 2.4X 1080P Full HD resolution, 300% more detailed than 720P. With 720P or 1080P analog videos, you don't have to bother seeing the details anymore. Plug and Play PoE System: If you take the 18m network cables out of the video surveillance kit and connect the security cameras to the NVR ports, you can view the security camera system that works with videos directly through an HDMI monitor. It's as simple as an analog camera kit. Intelligent detection of people and vehicles: This PoE CCTV system can distinguish the movement of a human or a vehicle from that of another object. This can prevent unnecessary alarms due to winding trees and insects. You can keep a smarter eye on your home or business. HDD storage, remote playback: With pre-installed 2TB HDD, it can store about 10 days of videos without overwriting. Without opening the NVR enclosure, you can add one external 4TB HDD through the e-SATA port. Reolink 8MP 5MP 4MP Cameras Compatible: With 8 PoE ports on the 4K NVR video recorder, the security system is expandable to work with up to 8 REOLINK PoE, Wi-Fi, fixed lens, Autofocus, bullet or dome cameras. You can also select and add 4 additional cameras from the RLC-410, 420, 511, 422, 423, 410W, 422W, 423WS camera types.About this item 5 Megapixels, 30m night vision: 2560x1920 super HD detail image and up to 30m night vision video surveillance, almost 2.4X 1080P Full HD resolution, 300% more detailed than 720P. With 720P or 1080P analog videos, you don't have to bother seeing the details anymore. Plug and Play PoE System: If you take the 18m network cables out of the video surveillance kit and connect the security cameras to the NVR ports, you can view the security camera system that works with videos directly through an HDMI monitor. It's as simple as an analog camera kit. Intelligent detection of people and vehicles: This PoE CCTV system can distinguish the movement of a human or a vehicle from that of another object. This can prevent unnecessary alarms due to winding trees and insects. You can keep a smarter eye on your home or business. HDD storage, remote playback: With pre-installed 2TB HDD, it can store about 10 days of videos without overwriting. Without opening the NVR enclosure, you can add one external 4TB HDD through the e-SATA port. Reolink 8MP 5MP 4MP Cameras Compatible: With 8 PoE ports on the 4K NVR video recorder, the security system is expandable to work with up to 8 REOLINK PoE, Wi-Fi, fixed lens, Autofocus, bullet or dome cameras. You can also select and add 4 additional cameras from the RLC-410, 420, 511, 422, 423, 410W, 422W, 423WS camera types.