Interface Type: USB 3.0 Ports: 4 Use this device directly to the 19PIN interface and the audio board into 2 USB3.0 interface, 2 USB2.0 interfaces and Headset output and microphone interface, installed in the idle CD-ROM position. This provides 4 USB interface and the audio interface front. Hardware requirements: 19PIN with USB3.0 interface and supports HD-AUDIO audio motherboard or adapter card a, with free CD-ROM a case. 2-port usb 2.0, 2-port usb 3.0, 1 HD Audio Output Port and 1 Microphone Input Port, meet different needs Easy installation,wear and tear, plug and play, no external power Super-Speed USB 3.0 supports data transfer speeds up to 5 Gpb/s. Backward compatible with USB 2.0 / 1.1. Compatible with WinXP/2003/VISTA/2008/Windows 7/WIN8 32/64BIT/ Plug in USB 3.0 connector on PC motherboard, extends the USB 3.0 from main board to a idle CD-ROM space. Extend interface, add new front ports, modify old machine colour:black Material:Metal + PC Package Contents: 2 x front panel 2 x 9PIN audio cable 2 x screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.