DVR's, also known as Digital Video Recorders are electronic devices that record videos in a digital format, they are mainly used with analogue cameras. The different channels indicate the amount of cameras they can facilitate, with an 8 channel DVR being able to house 8 CCTV cameras.
NVR systems record and store video footage directly from the network it lives on and work with IP Cameras. QVIS provide three different types of NVR's, these are 4K, NVR'S, Pro 4K NVR's and AI 4K NVR's, each come with different storage capacities: