Chieftec Black Box 3.5". Size: 88.9 mm (3.5 "), Hard drive interface: IDE/ATA. Interface: USB 2.0. Compatible operating systems: Windows 98SE-XP, MAC OS 9.X. Colour of product: Black. Dimensions (WxDxH): 205 x 135 x 40 mm, Weight: 0.43 kg