This Hikvision DS-7604NI-E1/4P/A is a professional NVR with 4x independant PoE ports making installation of IP cameras extremely simple without the need and expense of a PoE Switch or technical expertise. The NVR provides 40Mbps incoming bandwidth with up to 6MP recording resolution provides sufficient bandwidth to easily connect up to x4 4MP Hikvision IP cameras. 1x Sata ports allows for 1 Hard Drive up to a max of 6TB storage capacity.