Micronet Fantom. Hard drive capacity: 2048 GB, Hard drive interface: USB 2.0, Hard drive size: 88.9 mm (3.5 "). Data transfer rate: 480 Mbit/s, USB data transfer rates: 12, 480 Mbit/s. Colour of product: Black. Input voltage: 110-220 V. Server operating systems supported: Windows Server 2003, Windows Server 2008