TerraMaster NAS 1.6GHz/512MB Network Storage F4-NAS Cloud Storage 4 Bays NAS Server RAID Storage All-Aluminum Built Case for Small and Medium Business (Diskless) Supports a 4TB x 4 capacity hard disks configuration. Solid and Reliable All-Aluminum built Case; Positive Cooling Technology & System Fan Redundancy. CPU 1.6GHz, 512MB DDR, Gigabit Ethernet Running on the exclusive TOS operating system Excellent Reading and Writing Performance over 80MB/s