Hikvision DS-8664NXI-I8/S 64 Channel AcuSense NVR, Intelligent analytics based on deep learning algorithm, Up to 4-ch perimeter protection, Up to 4-ch facial recognition for video stream, Up to 8-ch facial recognition for face picture, Up to 16 face picture libraries, with up to 50,000 face pictures in total, Up to 64-ch IP camera inputs, Up to 32-ch 1080p decoding capability, Incoming Bandwidth 384 Mbps, Outgoing Bandwidth 256 Mbps, RAID0, RAID1, RAID5, RAID6, RAID10 Support global hot spare, 8 SATA interfaces (Up to 14 TB capacity for each disk), 1 eSATA interface, 100 to 240 VAC, 50 to 60 Hz.