Digital Video Recorders or DVRs are video recording devices that are equipped with digital capture cards to record surveillance video footage onto another digital medium such as hard disk drive, USB drive, or DVD disk. Digital Video Recorders are designed to record video from CCTV security cameras for surveillance applications. DVRs are available in 4ch, 8ch, 16ch, or 32ch; or we have PCI cards to install in a PC, or USB dongles.