This is our highest end NVR and probably the highest end NVR on the market. With this NVR you can manage and record up to 128 IP cameras. Of course, all of our IP cameras are compatible, but you can also use other ONVIF compliant IP cameras with it. This NVR is in a 3U server case. It can hold up to 16 hot swap able hard drives of 3TB each for a total of 48TB internal storage! There are 6 HDMI video output ports and 1 VGA port. This unit supports up to a total of 6 monitors. You can record up to 128 D1 resolution IP cameras, or 64 x 720p IP cameras or 32 x 1080p (2 Megapixel) IP cameras. This high end unit uses multiple Intel Core i7 processors and has an embedded LINUX operating system for incredible reliability. It comes with 4GB DDR3 ram which can be upgraded to 8GB. This Network Video Recorded supports multiple RAID configurations and has four separate Gigabit Ethernet ports which can each work independently or together. All the great features of our NVRs are also packed into this unit including motion detection and alarm inputs and outputs. The front cover supports a hot swapable 7" HD LCD monitor, there are 4 USB ports and 1 eSATA port for back up. ***Please note that this item is available by special order only. The lead time from the order date is 14-28 days and this item is non refundable, though it does come with our 3 year warranty****