The RocketPort EXPRESS Quad DB9M is a 4-port serial adapter that is compatible with systems that have x1, x2, x4, x8, x12 or x16 PCI Express expansion slots. The card is designed for standard and low-profile PCs and servers and ships with a low-profile and a standard-height bracket. The product provides support for software-selectable RS-232/422/485 serial communications and data transmission speeds up to 921 Kbps. Serial connections are made utilizing an external quadcable with four DB9M connectors that is included with the product. All RocketPort EXPRESS products are European RoHS directive compliant.