The Swann NVR4-7082 is one of the leading mid ranged video recording systems, boasting 720P High Definition with live viewing and play-back in real-time (up to 30 frames per channel) - that means greater picture sharpness to take in details about appearance, clothing and much more. The imaging technology within the NVR relays data via PoE (Power over Ethernet), running powerful cameras compatible with the NVR. It works only with the SWNHD-806CAM Cameras. With this system you are able to have 48 days recorded continuously from 4 channels only the pre-installed 1TB hard-drive, and more than 48 days if you've set the NVR to motion detection recording (only records when there's movement in the frame).