QVS UC2-100PM High Speed USB 2.0 PCI Host Adapter ( Windows / Mac ) USB 2.0 allows multiple peripheral devices to share the 40-time increased bandwidth Fully backward compatible with USB Revision 1.1 devices Ideal for devices requiring high speed transmission rates, such as external storage drives, scanners, DVD drives, CD-RW drives, Magneto-Optical drives, and digital cameras - camcorders Compliant with PCI Specification 2.2 Provides (4) external and (1) internal downstream Type A USB ports