1X ExpressCard 1x DB9 RS-232 Serial Card, 34mm. Add a Serial port to any laptop computer in minutes. Automated Out-of-band Hardware Flow Control Using:Tx/Rx/RTS/CTS/DSR/DTR/DCD/RI/GND. Package also includes: Serial Port ExpressCard 34mm Card. Driver CD. User Manual. Software Requirement: Window 7 (32/64 bit). Vista. Window XP (32/64 bit). Window 98SE. Window ME. Window 2000. Server 2003 (32/64 bit). Server 2008 (32/64 bit). Hardware Requirement: One Available ExpressCard 34mm/54mm Slot.