A Digital Video Recorder (DVR) is responsible for obtaining views from live cameras, store and retrieve video footages when it needs. Hikvision has DVR that can be connected upto 32 cameras and capable to control remotely. DVR displays live view on the monitoring device - screen and at the same time it will record data to the HDD connected to it. It can record all the video footage or only in a pre-configured security events occurred. It depends the operator the system owns.