LED IndicatorsPower, status, LAN, USB, HDD1-4 Hard Disk DriveCompatible with 4 x SATA 6Gb/s, 3Gb/s 3.5" & 2.5" HDDs & SSDs (with high-speed interface for HDD slot 1 & 2) NOTE: 1. The system is shipped without HDD. 2. For the HDD compatibility list, please visit https://www.qnap.com/compatibility Personalized desktop Smart toolbar and dashboard for system status Smart fan control Dynamic DNS (DDNS) SNMP (v2 & v3) Resource monitor Network recycle bin for file deletion via CIFS/SMB, AFP and File Station Automatic cleanup File type filter Comprehensive logs (events & connection) Syslog client/server Mobile app: Qmanager for remote system monitoring & managementYes TCP/IP: IPv4 & IPv6** Gigabit NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming ) Service Binding based on Network Interfaces Proxy client, proxy server DHCP client, DHCP server NTP server Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC UPnP & Bonjour Discovery USB Wi-Fi Adapter SupportYes