NVR a Network Video Recorder is a network camera that enables simultaneous recording and remote access to both live views and recorded images. The NVR is used in conjunction with network cameras that capture images and then transmit compressed video over the network. NVRs can be used on a standard IP network.

NVR  offer a powerful high definition IP recording and security monitoring system for small to medium sized installations.    

DVR security systems (digital video recorders) connect with security cameras, enabling you to record what the cameras see, and play it back at a later date. With remote viewing enable you to view security footage from a computer, your smartphone or tablet.