4K Ultra HD Night Vision - Record real-time live video with 4K Ultra HD (8MP, 3840 x 2160) cameras. The 18pcs powerful infrared LEDs emit lights that pierce the darkness up to 100 feet. Advanced 3D-DNR technology dramatically reduces noise levels. Say no to blurry images and embrace the 4k definition. | 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 - Connect the security cameras to the NVR with Ethernet cables up to 300ft, download the free Repolink APP and add the device information on APP. Just 3 steps for 24/7 surveillance purposes. Then you can live view and review locally through a monitor (not included) or remotely via Reolink app anytime, anywhere. Unlike wireless cameras, POE can offer a lossless video signal and a more stable network connection. | Continuous 24/7 Recording - With a pre-installed 2TB HDD, you are provided with reliable 24/7 recording. You can also install an external hard drive (up to 6TB) for backup storage. | 2-Year Warranty & Life-Time Tech Support - Reolink products have a 2-year warranty and lifetime tech support. Fell free to contact Reolink anytime for any questions or problems via Amazon message or email.