Gembird HD32-U3S-1. Storage media type: HDD, Storage drive interface: Serial ATA, Storage drive sizes supported: 63.5, 88.9 mm (2.5, 3.5 "). AC input voltage: 100-240 V, AC input frequency: 50/60 Hz, Output voltage: 12 V. Width: 134 mm, Depth: 83 mm, Height: 86 mm. Mac operating systems supported: Mac OS 9.2. Cables included: AC, USB