D-Link DNS-320-2TB. RAID levels: 0, 1, JBOD. Size: 88.9 mm (3.5 "), Hard drive interface: Serial ATA. Interface: 1 x Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45/ 1 x Hi-Speed USB. Compatible operating systems: Windows XP, Vista, 7. Operating relative humidity range: 5 - 90 %, Operating temperature range (T-T): 0 - 40 °C