DVRs from all manufacturers are equipped with centralized management software, which can be used to manage the video image and video unified storage of multiple hard disk recorders. All hard disk recorders can be connected to serial port hard disks, and users can select hard disks of different sizes to connect them according to their recording storage time.

The hard disk video recorder has BNC and VGA video output, and can be used with TV, monitor, computer monitor and other display devices. Some manufacturers integrate the display screen and hard disk video recorder.

Video viewing includes real-time video viewing and video playback.