Vantec NexStar. Product type: HDD duplicator, Number of simultaneous copies: 1 copies, Interface: SATA. Supported HDD sizes: 2.5,3.5", Supported HDD interfaces: Serial ATA III. Windows operating systems supported: Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium..., Mac operating systems supported: Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks. Dimensions (WxDxH): 5.91 x 4.25 x 2.42" (150 x 108 x 61.5 mm)