Mediasonic USB 3.0 PCI Express Card HP1-SU3<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Support USB transfer speeds of low speed (1.5Mbps)， full speed (12Mbps)， High Speed (480Mbps)， Super Speed (5Gbps) Compliant with PCI Express Base specification revision 2.0</li><li>OS support: Windows XP / Vista / 7 &amp; 8(32/64 bit) Note: This item does NOT support Mac OS</li><li>Interface: USB 3.0 SuperSpeed 5Gbps External Port: USB 3.0 port x 2 Output Voltage: DC 5V Dimensions: 121.5mm x 80mm x 21mm (LXWXH)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41vIuqF2EEL.jpg" noproxy>