DVR (Digital Video Recorder) is a device designed to record video in digital format on the HDD or SSD, USB drives, SD memory cards, and other storage devices. Video sources are video cameras connected to the DVR using cables or via a radio channel. Viewing recorded information can be performed in various ways: by connecting a monitor to the DVR, providing access to the DVR via the Internet or via a local network, and connecting the media (memory card, USB drive) to a computer.