CRU ToughTech Secure mini-Q. Total storage capacity: 750 GB, Hard drive capacity: 750 GB, Hard drive interface: Serial ATA. Power requirements: 100-240 VAC. Width: 225 mm, Depth: 130 mm, Height: 35 mm. Operating relative humidity range: 5 - 95 %. Compatible operating systems: Windows XP, Vista, 7 (32 & 64 bit) Mac OS X Linux