Security Digital Video Recorder has both features of digital video recorder(DVR) and digital video server(DVS). CCTV Security Digital Video Recorder can work stand-alone or be used to build a powerful network, widely used in surveillance fields. The System adopt graphical users operation interface, and support USB mouse, panel and remote operation. True full-duplex function, video, playback can work at the same time. Digital video recorders, or DVRs, are used to record television programming for future viewing. They are similar to VCRs, but they store information on a hard drive, like a computer's, instead of on videocassette. Many DVRs are available with subscription to wide variety of cable providers and are used to record cable shows, but DVRs, generally speaking, can be used to capture any television signal. HDD Video Recorder can easily be connected to televisions and set up with the use of the DVR remote.