Asustor AS6204RD Rack Mount 4 x Bay Hot Swappable Enterprise Network Attached Storage Device- 1U Rack Mount Chassis with Dual Redundant 250W Power Supply Units, Intel Celeron 1.6GHz Quad-Core (Burst up to 2.24GHz) Processor, Intel UHD 600 Graphics, CPU Architecture x64 64-bit, 4GB DDR3 SO-Dimm Memory, Expandable up to Maximum Memory Capacity 8 GB ( 2x SO-Dimm Memory Slots), 512MB DOM Flash Memory, 4 x 3.5 Inch SATA III Drive Bays, No Hard Drives Included Supports RAID Levels 0, 1, 5, 6, 10 and JBOD, Supports Four Hot-Swappable HDDs up to 16TB, Supports Intel AES-NI Hardware Encryption Engine, 4 x SuperSpeed USB 3.0 (5 GB/s) Port, 1 x HDMI 1.4b Port, 1 x RS-232 Com Port, 4 x Gigabit Ethernet Ports, 2 x 40mm System Fans, Disk Tray Locks, Smart Fan Temperature Control, ADM 2.6 Operating System, Retail Box, 1 Year Warranty