The Geovision NVR is designed purely for the digital network environment, it is a professional IP-based surveillance management software. It supports existing and new features found in the already popular Geovision software. GV-NVR is an out-of-the-box low cost solution that works off of a USB key only, no more need for a PCI capture card. It supports various IP camera manufacturers as well as the Geovision GV-IPCAM found here, please check the compatibility list before purchasing. Each GV-NVR supports different camera capicities, this particular model only supports 12 cameras.