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.

It is a set of computer system for image storage and processing, with the functions of long-time video recording, recording, remote monitoring and control of image/voice. DVR adopts digital recording technology and is far superior to analog monitoring equipment in image processing, image storage, retrieval, backup, network transmission, remote control, etc. DVR represents the development direction of TV monitoring system and is the preferred product of TV monitoring system on the market.