Promise Technology VTrak M310i. RAID levels: 6, 50, 1E, 1, 0, 5, Hard drive interface: Serial ATA, Hard drive size: 88.9 mm (3.5 "). Compliance industry standards: 802.3ad, Supported network protocols: TCP/IP. Power requirements: 100 - 240 VAC, 50 - 60Hz, Power supply: 300 W, Power consumption (typical): 347.72 W. Weight: 21000 g. Operating temperature range (T-T): 5 - 40 °C, Storage temperature range (T-T): -40 - 60 °C