Synology DS216+ Diskless System Network Storage Form Factor: 2-Bay Port RJ-45: 1 x 10/100/1000M Port USB: 1 x USB3.0 + 2 x USB2.0 Port eSATA: 1 x eSATA 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: Intel Celeron N3050 dual-core 1.6 GHz, burst up to 2.16 GHz Default/ Max. Memory: 1GB