A digital video recorder (DVR) is an essential device in the surveillance industry that is used to record the video from a security camera.  Each security camera unit is connected to the DVR with the use of a coax cable and BNC connectors.  The video transmission is then compressed and stored on a hard drive.  A DVR is very different from the older time lapse VCRs due to the fact that it digitally stores the data on a hard drive rather than on a VHS tape. One of the main advantages of having a DVR is that it will be able to store days, weeks, months and even years of video footages before it starts to record over itself.  This Continue Reading