Fantec DB-228US Backup HD. Hard drive capacity: 250 GB, Hard drive interface: USB 2.0, Hard drive size: 63.5 mm (2.5 "). Colour of product: Grey. Weight: 400 g. Certification: TÜV, CSA, CUL / UL, CE. Hard disk transfer rate: 480 Mbit/s, Material: Aluminium