Network video recorder is a device that records video in a networked environment. It is similar to a digital video recorder (DVR) but allows for remote viewing and administration over a network. NVRs are used in a variety of settings, including security surveillance, video doorbells, and baby monitors.

NVRs work by capturing video from a network of cameras and storing it on a hard drive. They can be set up to record continuously, or they can be programmed to record only when motion is detected. NVRs typically come with software that allows you to view the video footage, as well as create alerts and export video footage.

There are a few things to consider when choosing an NVR, including the number of cameras you need to support, the quality of the video you need to record, and the amount of storage you need.