Synology RS816 Diskless System Network Attached Storage (NAS) Port RJ-45: 2 x 10/100/1000M Port USB: 2 x USB3.0 Port eSATA: 1 x eSATA HDD Interface: 4 x SATA (4 x Bay) Processor: Marvell ARMADA 385 88F6820 dual-core 1.8 GHz Default/ Max. Memory: 1GB Supported Protocols: CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP) Power: AC Input Power Voltage: 100V to 240V Power Frequency: 50 Hz to 60 Hz, Single Phase