Synology DS216j Diskless System NAS DiskStation Form Factor: 2-Bay Port RJ-45: 1 x 10/100/1000M Port USB: 2 x USB3.0 HDD Interface: 3.5 / 2.5 SATA III / II x 2 (hard drives not included) Supported Protocols: Networking Protocols: CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP) Mail Server Protocols: POP3, SMTP, IMAP, support LDAP / AD account Printing Protocols: LPR, CIFS, IPP, iOS Printing, Google Cloud Print, Multi Functional Print Server (MFP functions are for Windows PC only) Download Protocols: BT / HTTP / FTP / NZB / eMule Processor: Marvell Armada 385 88F6820 Dual-core 1.0 GHz Default/ Max. Memory: 512MB Power: AC Input Power Voltage: 100V to 240V AC