StarTech.com 2-port 16C950 UART Multiport Serial Adapter

This 2 Port ExpressCard-based Serial Card lets you add 2 RS232 serial ports to your laptop or ExpressCard equipped desktop computer, using an available ExpressCard slot. Featuring 128-byte FIFO communication, and a high performance 16C950 UART, the ExpressCard Serial Adapter card offers up to 460Kbps data transfer rates, which ensures peak communication with your serial peripheral devices.