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 main functions of the hard disk video recorder include: monitoring function, video recording function, playback function, alarm function, control function, network function, password authorization function and work schedule function. It also includes the following functions: