The RocketPort EXPRESS Quad/Octa bulk is a four or eight port serial adapter that is sold in packs of 50.The product is with systems that have x1, x4, x8, 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 cable that is not included with the product. All RocketPort EXPRESS products are European RoHS directive compliant.