The StarTech PEX8S232485 PCI Express 8 Port RS-232 RS-422 RS-485 Serial Card is a high-quality interface card designed for expanding serial ports on a computer. With 8 ports and compatibility with RS-232, RS-422, and RS-485 standards, this serial card offers versatile connectivity options for a variety of devices. The card is designed for use with PCI ports and is a reliable choice for businesses or individuals needing to expand their serial connectivity capabilities.