The RocketPort EXPRESS Quad DB25M is a four 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 fan-out quadcable with four DB25M connectors that is included with the product. All RocketPort EXPRESS products are European RoHS directive compliant.