This is a StarTech 1-Port PCI Express RS232 Serial Adapter Card, model PEX1S953LP, TAA compliant. It is a PCIe RS232 Serial DB9 Host Controller Card featuring a 16950 UART based on the ASIX AX99100 chipset.This low-profile expansion card provides one DB9 port with bi-directional RS232 speeds up to 921.6Kbps. It includes an available 256-byte FIFO buffer and supports a 9th data bit. The card offers optional configurable power through pin 9, with choices of 12V, 5V, or none, providing up to 2A total.Designed for versatility, this card comes with a low-profile bracket pre-installed and includes a full-profile bracket for various installations in desktop and server environments. It supports both Windows and Linux operating systems. This adapter is suitable for applications such as point-of-sale terminals, PLCs, factory control and automation, scientific sensors, medical equipment, scanners, and oscilloscopes.