Koutech 4-Port SuperSpeed USB 3.0 Front Panel Hub (3.5") with Cable Compliant with Universal Serial Bus 3.0 Specification Revision 1.0 Four (4) USB 3.0 Type-A downstream ports and one (1) USB 3.0 upstream port SuperSpeed USB 3.0 is backwards compatible with USB Specification v.1.0/1.1/2.0/3.0 (data transfer rate at 1.5/12/480 Mbps/5 Gbps) Built-in with 4-pin Molex power connector for added power source to better support power hungry bus-powered devices Supports Windows XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8/ Mac OS 10.4