StarTech.com Serial Adapter with 16950 UART - Low-profile Plug-in Card - 1 Pack - PCI Express 1.1 x1 - PC, Linux - 2 x Number of Serial Ports External This multiport PCI Express RS232 serial adapter card lets you add two RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The dual port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 921.6Kbps. Maximum Compatibility With broad OS support, including for Windows and Linux, this 2 port PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-profile bracket, and includes optional low-profile brackets, so installation is easy regardless of the case form factor. This card is a direct replacement for PEX2S952 . Experience Optimal Technology This PCIe to serial adapter supports the following features: Industry standard 16950 UART compatible Supports max baud rate of up-to 921.6Kbps Provides 5/12V power output on Pin 9 when external power is connected 256-byte depth FIFO cache per transmitter and receiver Supports 9, 8, 7, 6, 5 data bits (one per port) Asix AX99100 chipset Base PCI Express 1.1 compliant Low and full-profile brackets included The Choice of IT Pros Since 1985 StarTech.com conducts thorough compatibility and performance testing on all our products to ensure we are meeting or exceeding industry standards and providing high-quality products to IT Professionals. Our local StarTech.com Technical Advisors have broad product expertise and work directly with our StarTech.com Engineers to provide support for our customers both pre and post-sales. PEX2S953 is backed by a StarTech.com lifetime warranty and free lifetime technical support.