1.The Single-Serial PC Card adds one high-speed serial port (RS232) to your notebook computer.2.Key Features and Benefits - Works with notebook PC with one Type II/III PC Card slot.Fast 16550 UART supports baud rate up to 115.2 Kbps.Built-in 16-byte FIFO buffer to speed up data transfer.Works with various types of RS-232 serial devices including modems, PDAs, label printers, bar code scanners, digital cameras and more.