All-in-one expansion kit includes PCI-E USB 3.0 controller card and 5.25 -inch front panel hub bracket; Four high-speed USB 3.0 ports deliver 5Gbps bandwidth for storage drives, peripherals and gaming gear; Standard 5.25 -inch CD-ROM bay bracket fits most ATX/MATX chassis for easy front access; PCI Express x1 interface compatible with all mainstream motherboards, stable signal transmission; Driver-free plug-and-play design, widely supported by Windows operating systems