Iomega 2TB ix2 Cold Swap, Professional. Hard drive capacity: 2000 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive interface: Serial ATA II. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 5 - 90 %