HD DVR is a professional digital audio and video recording device that records high definition video data and provides high quality recordings. These DVRs are widely used in various scenarios such as camera surveillance, game recording, flight recording and camcorder filming.

One of the types of HD DVRs is the storage type, which has an inbuilt hard drive for recording and storage. Independent external hard drive and U disk machine is also one of the common applications of storage type HD DVR, users can choose the recording method flexibly according to the need.

Another type is the storage and control combination type, this kind of VCR can not only record and store, but also control and management. This kind of VCR usually has a variety of control functions, such as video time setting, video mode selection, video file management and so on.

There is also a type of storage and control collection of integrated type, this kind of VCR can not only video and storage, but also control and management, but also can replace the video recorder, multi-picture frame processor and related control equipment.

The advantage of HD DVR is that it can provide high-quality video, but also can be video and storage control and management. In addition, HD DVRs have a wide range of control functions to meet the needs of different users.