Interface Type: USB 3.0. Ports: 4. Use this device directly to the 19PIN interface and sound card to 2 USB3.0 interfaces, 2 USB2.0 interfaces, as well as headphone output and microphone input, installed in the vacant CD-ROM position. This provides 4 USB interfaces and the audio interface at the front. Hardware Requirements: 19PIN with USB3.0 interface and supports HD-AUDIO motherboard or adapter card a, with a vacant CD-ROM bay. 2-port USB 2.0, 2-port USB 3.0, 1 HD audio output port, and 1 microphone input port, meeting different needs. Easy installation, wear, plug and play, no external Super-Speed USB 3.0 supports data transfer rates up to 5 Gpb/s. Backward compatible with USB 2.0 / 1.1. Compatible with WinXP/2003/VISTA/2008/Windows 7/WIN8 32/64BIT/ Connect the USB 3.0 connector on the PC motherboard, extending the USB 3.0 from the motherboard to a vacant CD-ROM space. Expand the interface, add new front ports, modify old machines. Color: black. Material: Metal + PC. Package Contents: 1 * front panel, 1 * 9PIN audio cable, 1 * screw. Only the above package contents, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.