RS232 Express card (2port) expresscard/34mm RS-232(chips:OXCF952) EXPRSSCARD/34mm RS-232(chips:OXCF952)1,2 x RS232 Port2,Compatible to 16C950 UART and its backwards3,Large 128-Byte transmit & receive FIFO4,Date Rate up to 921.6KB/s5,Compatible to USB2.0 Full Speed throughpu6,Fully Plug & Play and Hot Plug compatible7,Driver supported MS Windows 2000/XP/XP 64-bit, Linux,VISTA