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.

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.