NVR : A network video recorder is a specialized computer system that includes a software program that records video in a digital format to a disk drive, USB flash drive, SD memory card or other mass storage device. An NVR contains no dedicated video capture hardware Pan / Tilt / Zoom (PTZ) Cameras : Pan/tilt/zoom camera versatile .PTZ Cameras can pan (move left and right), tilt (move up and down), and zoom in or out. Additionally, PTZ cameras can rotate 360 degrees to view an object directly belowthem.Indoor and outdoor options are available
