EXDISPLAY Star Tech. com 1 Port Native Express Card RS232 Serial Adapter Card with 16950 UART - Express Card 54 Serial Card Add a high-speed RS-232 Serial port to your laptop computer via an Express Card expansion slot The high performing single chip design optimizes speed, reliability, and power while reducing CPU load by as much as 48% Compatible with both 34mm and 54mm Express Card slots; includes a slot spacer for greater security while installed in 54mm slots The EC1S952 1 Port Native Express Card RS232 Serial Adapter Card with 16950 UART lets you add an RS232 serial port to your laptop or Express Card-equipped desktop computer. The serial Express Card is designed based on a single-chip architecture (as opposed to cards that use a \"bridge chip\"), providing native PCI Express communication for greater performance and reliability by reducing the CPU load by up to 48%, and lowering power consumption. An included stabilizer bracket allows the EC1S952 to fit snugly in both 34mm and 54mm Express Card slots. Providing optimal communication with RS232 serial devices, this Express Card serial card supports baud rates of up to 115. 2Kbps and features a 128-byte FIFO buffer, plus a high performance 16C950 UART. Backed by a Star Tech. com lifetime warranty and free lifetime technical support. What\'s in the box Express Card to Serial Adapter 34 to 54mm slot spacer Driver CD Instruction Manual