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:

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.