NETGEAR ReadyNAS 2120 1U Rackmount 4-Bay Network Attached Storage, Diskless (RN2120-200NES) Marvell Armada XP Dual Core 1.6GHz with 2GB RAM, 2 eSATA ports, 2 GB LAN ports, and 3 USB ports (2 x USB 3.0, 1 x USB 2.0) Automatic Backup & Sync using the ReadyCLOUD app for PC and Cloud-managed Replication. Drive Types Supported SATA/SSD 2.5" or 3.5" Bit Rot Protection - A proprietary technology protecting your files from unplanned degradation Unlimited data snapshot capability for on-box protection and flexible data recovery. Power Supply Internal 180W: input 100-240V AC, 50/60Hz XRAID2 & Instant Provisioning - Easily expand capacity and feel confident knowing that data is always protected iSCSI and Thin Provisioning - Powerful tools for a businesses taking advantage of virtual infrastructures Anti-virus & Encryption - Keep data protected from outside threats and safe from prying eyes