Wiebetech ToughTech Secure mini-Q WriteProtect. Size: 63.5 mm (2.5 "), Hard drive interface: Serial ATA. Compatible operating systems: Windows XP, Vista, 7 (32 / 64 bit), Mac OS X, Linux. Relative humidity: 5 - 95 %. Colour of product: Silver. Weight: 907 g, Width: 225 mm, Depth: 130 mm