StarTech.com 2-Port PCI RS232 Serial Adapter Card, PCI Serial Port Expansion Controller Card, PCI to Dual Serial DB9 Card, Standard (Installed) & Low Profile Brackets, Windows/Linux - Dual Port PCI Serial Card (PCI2S5502) - Serial adapter - PCI low profil

This multiport PCI RS232 serial adapter card lets you add two RS232 (DB9) serial ports to your computer through a PCI slot, as if they were native serial ports. The dual port PCI serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 115.2Kbps.
With broad OS support, including for Windows (7 and up), and Linux (2.6.x to 5.x LTS versions only), this 2 port PCI 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 PCI2S550 LP and PCI2S550.
This PCI to serial adapter supports the following features: Industry standard 16C550 UART compatible; Supports baud rate up-to 115.2Kbps; 256-byte depth FIFO cache per transmitter and receiver; Supports 9, 8, 7, 6, 5 data bits (one per port); Asix MCS9865 chipset.
Low and full-profile brackets included.