StarTech 1-Port PCI Express RS232 Serial Adapter Card PEX1S953LP TAAThis serial adapter card adds one RS232 DB9 port to your desktop or server through a PCI Express slot. It's ideal for systems that need to connect to legacy serial devices like card readers, printers, PIN pads, and industrial equipment. The card supports data transfer speeds up to 921.4Kbps and works with Windows and Linux operating systems. Installation is straightforward with both low-profile and full-profile brackets included, making it compatible with various case form factors. The card is backed by a lifetime warranty and free technical support.