With five USB 2.0 ports (one is built-in); Transmission rate: 480Mbps; Compatible w/ USB 1.0 / USB 1.1; Supports hot plug and play; Fine and elegant workmanship; No need driver (win 98 need to download); Adopts via chip more stable compatible w/ various motherboard chips; Compatible w/ USB 1.X; Can connect to USB 1.x or USB 2.0 devices at the same time; Interface transmitting rate: 1.5Mbps(USB1.0) 12Mbps(USB1.1) 480Mbps(USB2.0); Supports Windows 98 / ME / 2000 / 2003 / XP / VISTA / MAC OS 8.6+; Supports PCI bus power management interface; Can connect to USB devices such as USB flash drive USB mouse USB scanner keyboard and digital camera etc. CD: http://m5.img.dxcdn.com/CDDriver/CD/sku.311476.rar