This CardBus RS232 Serial Laptop PC Adapter Card adds two RS232 serial ports to a notebook computer, letting you connect your mobile computer to serial peripheral devices. Supporting data transfer rates of up to 115.2Kbps, the RS232 serial adapter features a high performance 16950 UART chipset, ensuring flawless connectivity with your serial peripherals. The adapter is backed by StarTech"s Lifetime Warranty and free, lifetime technical support.